Police shot and killed two suspected thugs at Garden estate in Nairobi on Friday night.
They found a pistol with seven bullets in the incident at about 11 pm as they patrolled the area.
Officers from the Special Crime Prevention Unit said two other suspects escaped.
They said they the four, who were on foot, intended to commit a crime.
At Umoja Innercore, police killed two suspected criminals last night.
They took their motorcycle to Buruburu police station.
The bodies were taken to City Mortuary.