Two killed in shootings at four 7-Eleven stores in southern California

Attacks appear to have occurred after robberies or robbery attempts on day store is marking 95th birthday

Two people were killed and three were wounded in shootings at four 7-Eleven locations in southern California early on Monday morning, authorities said, in a series of attacks that police believe may be connected.

The shootings appear to have occurred after predawn robberies or attempted robberies at the four convenience stores on July 11, or 7/11 - a day when the national 7-Eleven brand is celebrating its 95th birthday by giving out free Slurpee drinks.