MORELIA, Mexico (AP) -- Mexicans have set up makeshift altars on the stone walkways where grenades ripped through crowds of people celebrating Independence Day in the colonial city of Morelia Monday.
The attack left seven people dead and more than 100 others hurt. It's not clear who's responsible for the killings.
The state's governor says Morelia was one of several cities that had received threats before their Independence Day celebrations, but was the only one hit. The governor blames Mexico's warring drug cartels for the attack, but hasn't offered much evidence.
Mexican President Felipe Calderon has pledged an immediate military response.
Mexico is seeing increasing violence stemming from drug cartels.
(Copyright 2008 by The Associated Press. All Rights Reserved.)
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