TJ Kajwang, a lawyer, was arrested outside a Nairobi court building, and has been ordered to go to the offices of the Directorate of Criminal Investigation, a Kenyan TV station has tweeted:

The Star Breaking @TheStarBreaking

RUARAKA MP TJ Kajwang arrested outside Milimani law courts, asked to head to DCI headquarters.

Wearing his wig, Mr Kajwang stood next to Mr Odinga as he took the "presidential oath" in front of tens of thousands of opposition supporters at Uhuru Park yesterday