Key protest leader Panusaya Sithijirawattanakul was one of several activists arrested on Thursday.
Protesters come out in thousands to protest near the King's motorcade. The BBC's Jonathan Head was there.
By William McLennan
A veterinarian in Thailand stepped in to help a woman give birth on the side of the road in Bangkok.
Commuters tell us in one word why their city has the worst traffic in the world.