Two people were killed and at least 30 others were wounded in overnight mass shootings in three states, authorities said Saturday, stoking concerns that a spike in U.S. gun violence during the coronavirus pandemic could continue as summer dawns and eased restrictions allow people more freedom to socialize.

No one was arrested as of Saturday afternoon in any of the attacks, which took place late Friday or early Saturday in the Texas capital of Austin, Chicago and Savannah, Georgia.

In Austin, authorities were searching for two male suspects in an early Saturday shooting on a crowded pedestrian-only street packed with bars and restaurants. Fourteen people were wounded, including two critically, in the gunfire, which the city's interim police chief said is believed to have started as a dispute between two parties.

Interim Austin Police Chief Joseph Chacon speaks at a news conference about the shooting, Saturday, June 12, 2021 in downtown Austin, Texas. Police were searching for two people suspected in a mass shooting on a crowded downtown Austin street early Saturday in which 14 people were wounded, including two critically. (Ana RamirezAustin American-Statesman via AP)

Interim Austin Police Chief Joseph Chacon speaks at a news conference about the shooting, Saturday, June 12, 2021 in downtown Austin, Texas. Police were searching for two people suspected in a mass shooting on a crowded downtown Austin street early Saturday in which 14 people were wounded, including two critically. (Ana RamirezAustin American-Statesman via AP)

In Chicago, a woman was killed and nine other people were wounded when two men opened fire on a group standing on a sidewalk in the Chatham neighborhood on the city's South Side. The shooters also got away and hadn't been identified as of mid-Saturday afternoon.

In Savannah, police said one man was killed and seven other people were wounded in a mass shooting Friday evening. Two of the wounded are children — an 18-month-old and a 13-year-old.

Savannah's police chief, Roy Minter, Jr., said the shooting may be linked to an ongoing dispute between two groups, citing reports of gunshots being fired at the same apartment complex earlier in the week.

Interim Austin Police Chief Joseph Chacon speaks at a news conference about the shooting, Saturday, June 12, 2021 in downtown Austin, Texas. Police were searching for two people suspected in a mass shooting on a crowded downtown Austin street early Saturday in which 14 people were wounded, including two critically. (Ana RamirezAustin American-Statesman via AP)

Interim Austin Police Chief Joseph Chacon speaks at a news conference about the shooting, Saturday, June 12, 2021 in downtown Austin, Texas. Police were searching for two people suspected in a mass shooting on a crowded downtown Austin street early Saturday in which 14 people were wounded, including two critically. (Ana RamirezAustin American-Statesman via AP)

“It's very disturbing what we're seeing across the country and the level of gun violence that we're seeing across the country," he told reporters Saturday. "It's disturbing and it's senseless.”

The attacks come amid an easing of pandemic restrictions in much of the country, including Chicago, which lifted many of its remaining safeguards on Friday. Many hoped that a spike in U.S. shootings and homicides last year was an aberration perhaps caused by pandemic-related stress amid a rise in gun ownership and debate over policing. But those rates are still higher than they were in pre-pandemic times, including in cities that refused to slash police spending following the death of George Floyd and those that made modest cuts.

“There was a hope this might simply be a statistical blip that would start to come down," said Chuck Wexler, executive director of the Police Executive Research Forum. “That hasn't happened. And that's what really makes chiefs worry that we may be entering a new period where we will see a reversal of 20 years of declines in these crimes.”

Tracking ups and downs in crime is always complicated, but violent crime commonly increases in the summer months. Weekend evenings and early-morning hours also are common windows for shootings.

Many types of crime did decline in 2020 and have stayed lower this year, suggesting the pandemic and the activism and unrest spurred by the reaction to Floyd’s death didn’t lead to an overall spike in crime.

The number of mass shootings in 2020 was the lowest in decades, according to a database compiled by The Associated Press, USA Today and Northeastern University that tracks mass killings. The database defines a mass killing as four or more dead, not including the shooter.

The Gun Violence Archive, which monitors media and police reports to track gun violence, defines mass shootings as those involving four or more people who were shot, regardless of whether they died. According to its database, more than 8,700 people have died of gun violence in the U.S. this year.

The GVA also found that shootings spiked in 2020 to about 600, which was higher than in any of the previous six years it tracked the statistic. According to this year's count, there have been at least 267 mass shootings in the U.S. so far, including the latest three overnight Friday into Saturday.

“It’s worrisome,” said James Alan Fox, a criminologist and professor at Northeastern University. “We have a blend of people beginning to get out and about in public. We have lots of divisiveness. And we have more guns and warm weather. It’s a potentially deadly mix.”