MOMBASA - At least 10 Kenyan police officers were injured when a grenade was hurled at them by suspected al Shabaab sympathizers during a police operation at the country's Coast province in the early hours of Wednesday, police said.

"We recovered a pistol, an AK-47 rifle, 15 rounds of ammunition and two grenades ... We believe these people are connected to al Shabaab," said Aggrey Adoli, the head of police for Coast province.