This is the horrifying moment shots ring out in broad daylight as a gun-wielding attacker opens fire on police.
The attack, in Baton Rouge in Louisiana, has seen three police officers killed.
A witness told WBRZ News 2 that a man dressed in black and with his face covered began shooting indiscriminately after walking out of a convenience store and car wash.
In the footage, several gunshots can be heard ringing out one by one. Then a dramatic flurry of shots can be heard as the shootout intensifies.
Other vehicles can be seen speeding away for safety, with another video showing a SWAT team vehicle racing towards the scene.
Follow our blog for live updates on Baton Rouge here
He told CNN: "There is still an active scene. They are investigating.
"Right now we are trying to get our arms around everything. It's just been one thing after another."
Twitter user Kelsei LuBom, who is from Baton Rouge, wrote: "Whoever it was they was shooting indiscriminately.
"My aunt is a emergency nurse at the lake (an apparent reference to Our Lady of the Lake Regional Medical Center) & she told me at least 6 are there now."
She later added: "To my knowledge they've caught one!"
The incident began at around 9am local time between Baton Rouge Police Headquarters and the I-12 road.
A very large manhunt began immediately.
Mayor Holden added: "We're asking citizens to stay away from that area. And as it's Sunday we're asking people to pray for the families and officers."
Tensions are high in Baton Rouge after the killing of 37-year-old Alton Sterling by police.
However no clear motive for the shooting has yet been established.
