LA CRESCENTA — Two burglars made off with an unknown amount of prescription drugs in an overnight burglary at a Walgreens Pharmacy, authorities said.

Deputies responded to a burglary alarm about 3 a.m. Saturday at the store, 3001 Foothill Blvd., but the burglars had already fled, Los Angeles County sheriff’s Sgt. Randy Tuinstra said.

The two burglars, initially described only as male, smashed the front window of the business to get in, then helped themselves to the pharmaceuticals, the sergeant said.

The type and amount of drugs stolen were not clear Saturday, he added.

Tuinstra said detectives were going over video surveillance footage in hopes of developing a description of the burglars.