According to Kenyan intelligence at least 12 suspected Al Shabaab members are believed to be plotting an attack against Parliament.
The warning has prompted all government institutions to be put on heightened security alert.
Intelligence reports indicate that six of the suspects could be in Nairobi already although the whereabouts of the other six are yet to be established.
Intelligence reports have warned that a vehicle carrying explosive materials is likely to be used against Parliament unless police thwart the attempt. It was not clear where the vehicle could be and when the attack will be carried out.
The attack, according to the security report, was planned by Mohammed Mohamud alias Dulyadeen alias Gamadheere, who it said heads one of the arms of Al-Shabaab.
Reports about the possible attack came as it emerged that the Egyptian embassy in Nairobi had also asked Kenya’s security agents to heighten security measures around Egyptian installations, including the embassy itself, its envoy’s residence and other sensitive Egyptian organizations and premises.