Two men were shot dead over the weekend by San Antonio officers.
Bexar County Sheriff Javier Salazar said deputies were making a routine traffic stop late Saturday when a man bolted from the car and tried to flee.
During the foot chase, Salazar said the man is believed to have fired a gunshot at the pursuing deputy, drawing fatal return fire.
In a separate incident, police Chief William McManus said officers on drug patrol encountered a man sitting in his vehicle early Sunday. McManus said the man saw them approach, tried to flee, pulled a gun from his waistband and was shot dead.
All three officers involved have been placed on administrative leave pending internal investigations.