Mexicans appear divided over whether the government did the right thing in releasing a drug kingpin's son whose supporters shot up the northern city of Culiacan.

Some polls suggested Monday that public opinion is roughly split on whether to accept the government's argument that it was more important to save lives than to arrest Ovidio Guzmán.

Weaponry like a machine gun and hand grenades seized after Thursday's clashes suggest the death toll could have been very high had the government held firm.

But the head of the country's National Human Rights Commission said, "The rule of law has given way to the rule of force."