St. Louis, MO  (KTRS)  St. Louis Police Chief Sam Dotson is taking precautions for his officers in response to the sniper attacks on police in Dallas.

Dotson tweeted that “Due to events unfolding in Dallas, Texas, effectively immediately, all on-duty officers will work in pairs until further notice. No police officers, park rangers or marshals will be sent or handle any assignments without a partner.”

Dotson also says “all personnel leaving any of the stations for enforcement activities” will be required to wear a bullet proof vest.

Five officers were killed and several were injured during a Black Lives Matters protest in downtown Dallas Thursday night.