Bomb experts on Thursday found an explosive device inside the Dusit office park.
Through their Twitter handle, the National Police Service (NPS) has urged the public not to be alarmed if they hear a blast when their officers detonate the device.
“We wish to inform the general public that bomb experts from the @DCI_Kenya are still combing the scene of the Dusit incident for any remaining explosives or booby traps that could have been left by the slain attackers,” said NPS.
Interior C S Fred Matiang’i on Wednesday declared the Dusit area an active crime scene as security officers piece gather information to pursue those who funded the attackers.
All the attackers who stormed the 14 Riverside Drive building were killed.
The attack left over 21 people dead and scores injured.
Red Cross on Thursday said 19 people are still missing raising fears of a death toll higher than 21.