11.31pm BST

Here's a summary of where things stand:

• Police shot a motorist dead after a confrontation at a White House barrier and car chase in the direction of the US Capitol. A one-year-old child was taken from the vehicle and is in protective custody, police said.

• Multiple shots were fired by officers with both the Secret Service and US Capitol police. Multiple crime scenes have been established.

• The fleeing vehicle hit and injured a secret service officer, said a spokesman, and a Capitol police officer was injured when his car struck a barrier. Both officers were in good condition.

• Capitol police chief Kim Dine said there was no "terrorism nexus" but Washington DC police chief Cathy Lanier said "I'm pretty confident this was not an accident." "This was a lengthy pursuit," Lanier said. "Two security perimeters that were attempted to be breached."

• Law enforcement gave few details of the suspect. "We're not going to answer any questions about the suspect," Lanier said.

• The incident began when the vehicle tried to cross an "outer perimeter" barrier at the White House. Lanier said a video of the chase does not capture events before and afterward.

• Secret service spokesman Ed Donovan said "Our officers acted appropriately." Dine said, "It appears all along the capitol the security worked exceptionally well."