AP PHOTOS: Athletes showcase tattoos of Olympic rings, lions and superheroes at World Indoors

NANJING, China (AP) — Tattoos depicting warriors, superheroes, lions and the Olympic rings were among the motivational motifs inked onto some of the athletes competing at the World Indoor Championships in Nanjing, China, over the weekend.

For Brazilian sprinter Matheus Lima, the Olympic rings stood out on his right shoulder under the image of a big cat with a full mane when he raced on Friday.

Some other Olympians have more subtle representations of the rings, like Canada's two-time world indoor shot put champion Sarah Mitton, who has the interconnected blue, black, red, yellow and green logo on the back of her arm.

Athletes traveled from all over the world to compete at the three-day indoor championships, and the styles of body art varied as much as the individuals who jumped, ran or threw in the hope of winning medals in Nanjing.

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Camryn Newton Smith competes in the Pentathlon women's high jump during the World Athletics Indoor Championships in Nanjing, China, Friday, March 21, 2025. (AP Photo/Dar Yasin)

Valters Kreiss, of Latvia, makes an attempt in the men's pole vault final during the World Athletics Indoor Championships in Nanjing, China, Saturday, March 22, 2025. (AP Photo/Dar Yasin)

Jacory Patterson stands before the start of 400 meters men's heat during the World Athletics Indoor Championships in Nanjing, China, Friday, March 21, 2025. (AP Photo/Dar Yasin)

Chase Jackson, of the United States, competes in the women's Shot Put final during the World Athletics Indoor Championships in Nanjing, China, Friday, March 21, 2025. (AP Photo/Dar Yasin)

Devine Charlton, of Bahamas, celebrates after winning gold in the women's 60 meter hurdles at the the World Athletics Indoor Championships in Nanjing, China, Sunday, March 23, 2025. (AP Photo/Dar Yasin)

Ewa Swoboda of Poland stand after winning the women's 60 meter semifinal during the World Athletics Indoor Championships in Nanjing, China, Saturday, March 22, 2025. (AP Photo/Dar Yasin)

Jacory Patterson, left, of the United States, receives the baton from teammate Brian Faust, during the World Athletics Indoor Championships in Nanjing, China, Sunday, March 23, 2025.(AP Photo/Dar Yasin)

Matheus Lima prepares to compete in 400 meters men's heat during the World Athletics Indoor Championships in Nanjing, China, Friday, March 21, 2025. (AP Photo/Dar Yasin)

Valters Kreiss, of Latvia, practices before the start of the men's pole vault final during the World Athletics Indoor Championships in Nanjing, China, Saturday, March 22, 2025. (AP Photo/Dar Yasin)

Jakob Ingebrigtsen, of Norway, celebrates after winning the gold medal in the men's 3000 meters final at the World Athletics Indoor Championships in Nanjing, China, Saturday, March 22, 2025. (AP Photo/Dar Yasin)

Sarah Mitton of Canada, left, and Chase Jackson, of the United States, participate in the women's Shot Put final during the World Athletics Indoor Championships in Nanjing, China, Friday, March 21, 2025. (AP Photo/Dar Yasin)

NEW YORK (AP) — Thousands of nurses in three hospital systems in New York City went on strike Monday after negotiations through the weekend failed to yield breakthroughs in their contract disputes.

The strike was taking place at The Mount Sinai Hospital and two of its satellite campuses, with picket lines forming. The other affected hospitals are NewYork-Presbyterian and Montefiore Medical Center in the Bronx.

About 15,000 nurses are involved in the strike, according to New York State Nurses Association.

“After months of bargaining, management refused to make meaningful progress on core issues that nurses have been fighting for: safe staffing for patients, healthcare benefits for nurses, and workplace violence protections,” the union said in a statement issued Monday. “Management at the richest hospitals in New York City are threatening to discontinue or radically cut nurses’ health benefits.”

The strike, which comes during a severe flu season, could potentially force the hospitals to transfer patients, cancel procedures or divert ambulances. It could also put a strain on city hospitals not involved in the contract dispute, as patients avoid the medical centers hit by the strike.

The hospitals involved have been hiring temporary nurses to try and fill the labor gap during the walkout, and said in a statement during negotiations that they would “do whatever is necessary to minimize disruptions.” Montefiore posted a message assuring patients that appointments would be kept.

“NYSNA’s leaders continue to double down on their $3.6 billion in reckless demands, including nearly 40% wage increases, and their troubling proposals like demanding that a nurse not be terminated if found to be compromised by drugs or alcohol while on the job," Montefiore spokesperson Joe Solmonese said Monday after the strike had started. "We remain resolute in our commitment to providing safe and seamless care, regardless of how long the strike may last.”

New York-Presbyterian accused the union of staging a strike to “create disruption,” but said in a statement that it has taken steps to ensure patients receive the care they need.

"We’re ready to keep negotiating a fair and reasonable contract that reflects our respect for our nurses and the critical role they play, and also recognizes the challenging realities of today’s healthcare environment,” the statement said.

The work stoppage is occurring at multiple hospitals simultaneously, but each medical center is negotiating with the union independently. Several other hospitals across the city and in its suburbs reached deals in recent days to avert a possible strike.

The nurses’ demands vary by hospital, but the major issues include staffing levels and workplace safety. The union says hospitals have given nurses unmanageable workloads.

Nurses also want better security measures in the workplace, citing incidents like a an incident last week, when a man with a sharp object barricaded himself in a Brooklyn hospital room and was then killed by police.

The union also wants limitations on hospitals’ use of artificial intelligence.

The nonprofit hospitals involved in the negotiations say they’ve been working to improve staffing levels, but say the union’s demands overall are too costly.

Nurses voted to authorize the strike last month.

Both New York Gov. Kathy Hochul and Mayor Zohran Mamdani had expressed concern about the possibility of the strike. As the strike deadline neared, Mamdani urged both sides to keep negotiating and reach a deal that “both honors our nurses and keeps our hospitals open.”

“Our nurses kept this city alive through its hardest moments. Their value is not negotiable,” Mamdani said.

State Attorney General Letitia James voiced similar support, saying "nurses put their lives on the line every day to keep New Yorkers healthy. They should never be forced to choose between their own safety, their patients’ well-being, and a fair contract.”

The last major nursing strike in the city was only three years ago, in 2023. That work stoppage, at Mount Sinai and Montefiore, was short, lasting three days. It resulted in a deal raising pay 19% over three years at those hospitals.

It also led to promised staffing improvements, though the union and hospitals now disagree about how much progress has been made, or whether the hospitals are retreating from staffing guarantees.

Nurses strike outside New York-Presbyterian Hospital, Monday, Jan. 12, 2026, in New York. (AP Photo/Yuki Iwamura)

Nurses strike outside New York-Presbyterian Hospital, Monday, Jan. 12, 2026, in New York. (AP Photo/Yuki Iwamura)

Nurses strike outside New York-Presbyterian Hospital, Monday, Jan. 12, 2026, in New York. (AP Photo/Yuki Iwamura)

Nurses strike outside New York-Presbyterian Hospital, Monday, Jan. 12, 2026, in New York. (AP Photo/Yuki Iwamura)

Nurses strike outside New York-Presbyterian Hospital, Monday, Jan. 12, 2026, in New York. (AP Photo/Yuki Iwamura)

Nurses strike outside Mount Sinai West Hospital, Monday, Jan. 12, 2026, in New York. (AP Photo/Yuki Iwamura)

Nurses strike outside Mount Sinai West Hospital, Monday, Jan. 12, 2026, in New York. (AP Photo/Yuki Iwamura)

Nurses strike outside Mount Sinai West Hospital, Monday, Jan. 12, 2026, in New York. (AP Photo/Yuki Iwamura)

Nurses strike outside Mount Sinai West Hospital, Monday, Jan. 12, 2026, in New York. (AP Photo/Yuki Iwamura)

FILE - A medical worker transports a patient at Mount Sinai Hospital, April 1, 2020, in New York. (AP Photo/Mary Altaffer, File)