Thirteen people were killed and 17 others wounded on Sunday as gunmen stormed a high school party in Ciudad Juarez, a Mexican town bordering the United States.

Ciudad Juarez municipal authorities said that most of the victims of the attack were youngsters without giving further details.

The deaths were part of a weekend shoot-to-kill spree in which 24 people were killed in violence related to turf battles between drug cartels in the country.

Witnesses said that the gunmen arrived in several motor vehicles and started firing their guns at people outside the house where a birthday party was being held.

Ciudad Juarez, a town of 1.5 million residents, holds Mexico's record in bloodshed. Last year alone, more than 2,600 people were killed there in drug-related gang crimes.

Mexico is the key transit route for U.S.-bound cocaine from South America and the country itself is a top producer of marijuana and heroin.