'Everyone else was running, but they didn't seem to be in a hurry'

Police in California are continuing investigations into a mass shooting on Wednesday in which 14 people were killed.

Two suspects, who were killed in an exchange of fire with police, have been named as Syed Rizwan Farook, 28, and Tashfeen Malik, 27.

The shootings happened at the Inland Regional Centre in San Bernardino.

Eyewitness Glenn Willwerth was at work when the attack took place, and told the BBC's Laura Trevelyan what he saw.