US police officers shot in four attacks in one day

[Suarez™]

Four policemen have been shot in 24 hours across the US in the latest in a series of attacks on law enforcement.
One officer was shot dead in San Antonio, Texas, and another was shot in the face in St Louis, Missouri, though he is expected to survive.
At least two of Sunday's attacks were ambushes. Two other officers were shot elsewhere in Missouri and Florida.
The attacks revived memories of deadly ambushes against police in Texas and Louisiana in July.
Fifty-seven US law enforcement officers have been fatally shot this year, a 68% percent increase from the same period in 2015.