At least 11 people were shot dead at a teenager’s birthday party in Mexico’s Guerrero state, authorities said Sunday. The incident reportedly occurred Friday at a “quinceanera” coming-of-age celebration.

“There was a problem at a 15th birthday party, and according to the information we have, 11 people were killed,” Guerrero governor Hector Astudillo reportedly said at a news conference Sunday. He also added that after the shooting, authorities tried to reach the area but were met by gunfire.

Astudillo reportedly said that details of the case would be passed to Mexico's attorney general. However, he did not mention if any arrests were made in the case, BBC reported.

Guerrero, one of the poorest states in Mexico, is not far from the border with Michoacan, where drug-related crimes, including homicides, are a regular occurrence, according to reports.

The state was last in the spotlight when 43 students disappeared from here two years ago. Sixty hidden graves containing at least 129 bodies, all unconnected to the missing students’ case, have been found in Guerrero since October 2014.

According to BBC, which cited figures compiled by the La Jornada newspaper, at least 324 people were murdered in Guerrero between October and December 2015, mostly drug trade-related cases.