NAIROBI, Dec. 14 (Xinhua) -- At least four people were killed and 25 others injured in a grenade attack on a minibus Saturday in the Kenyan capital Nairobi, police said.
Nairobi County Commander Benson Kibui confirmed the casualties after a 32-seater minibus was targeted at 6 p.m. local time in the neighborhood of a Somali community.
He said they believe the attackers might have used the improvised explosive device to cause the massive damage on the matatu plying central business district-Eastleigh route.
Security officers have cordoned off the scene and advised the public to keep away.
"We have secured the scene as we intensify thee search for the other assailants," Kibui said of the incident which occurred at around 6 p.m. local time.
Grenade attacks have been launched several times since Kenya sent troops into Somalia in October 2011 in pursuit of the Al- Qaida linked militant group Al-Shabaab, which vowed more attacks in retaliation.