The trio face an additional charge of conspiracy to commit an offence.
The three denied the charges before the Makadara Law Courts in Nairobi.
A conductor who allegedly colluded with thugs to rob a passenger of her mobile phone in a matatu in Kayole, Nairobi before dumping her along the way has been charged with robbery with violence.
Joseph Maina Mwangi, who works for Forward Travelers Sacco in Mihang'o, is charged along with two accomplices – Robert Maina Mustapha and Dennis Musyoki Kivindu.
