NAIROBI: Four Kenyan civilians were killed in a gunfight on Tuesday between police and al Shabaab militants from Somalia who attacked a telecommunications mast in the third such deadly incident in Kenya this week, police said. Officers killed two attackers and recovered two assault rifles and bomb-making materials, police spokesman Charles Owino said. The United States has sent more troops to Kenya to reinforce security after al Shabaab killed three Americans on Sunday in an attack a military base in Kenya used by U.S. forces. In the latest incident, police said militants fired at a mast belonging to Kenya’s leading operator Safaricom and at police guarding the facility. “Officers manning the mast and the base together with special forces were able to repulse them,” police said. The raid took place in northern Garissa county, which neighbors Somalia. The attackers did not damage the telecom network, police said.–Agencies