Protesters threw a grenade at a vehicle carrying anti-riot police in Mombasa Tuesday , killing one officer and wounding 13 others , a police official said . The violence came on the second day of protests after a radical Muslim cleric was killed in the same city Monday by assailants his wife claims were police . Provincial police chief Aggrey Adoli told CNN the police were on their way to help beef up security because of the ongoing riots . An unknown perpetrator hurled a grenade at the police truck , causing the fatality and injuries . The wounded are being treated at two hospitals in Mombasa , Adoli added . Earlier , protesters barricaded roads with stones and blocked access to and from the Majengo neighborhood , where Aboud Rogo Mohammed often preached . Demonstrators stopped vehicles from coming into or leaving the area , and threw stones at police , who responded with tear gas . The radical Islamic cleric , who faced charges relating to terrorism , was killed in a daylight ambush Monday morning in the coastal city of Mombasa , Kenya police said . Aboud Rogo Mohammed was accused of supporting Al-Shabaab militants in Somalia and was blacklisted by the United States and the United Nations Security Council . He also faced charges before a Kenyan court for planning terror attacks in Mombasa , Kenya 's second-largest city and a popular tourist destination . Kenya Police spokesman Eric Kiraithe said Monday authorities were taking Rogo 's death seriously . `` It is disappointing to us , because we had a case in court and we had evidence to go to its logical conclusion , '' Kiraithe said . But Rogo 's wife , Hania Said , claimed Monday the shooters were Kenyan police . Kiraithe dismissed that claim and asked for the public to give the police information . `` That can only be nonsense , '' he said . `` For what conceivable reason would that happen ? What we need is for everyone to cooperate without any fear . We have a witness protection program now . '' Rogo 's wife said the cleric was traveling with his family in a van on the Mombasa-Malindi highway when they were ambushed by a group of men who shot her husband more than a dozen times . She said she was shot in the leg and Rogo 's father was shot in the hand . Their van , a 14-seat white Nissan , was riddled with bullets and splattered with blood . Police tried to take away Rogo 's body , but a group of supporters refused and took it away to be buried in the Muslim public cemetery . The shooting sparked immediate protests by Mombasa 's Muslim community . Anti-riot police responded with tear gas , and a government vehicle was burned near a mosque where Rogo once preached . After violence broke out Monday , Prime Minister Raila Odinga called for restraint by residents of Mombasa , and asked that the government be allowed to get to the bottom of the matter . `` I appeal to our people not to use this sad act to inflict more pain and suffering on our country , '' said a statement on the prime minister 's website . `` Let us come together in calm instead and join hands in order to get to the bottom of the murder . '' Aside from its sandy white beaches that draw big tourism dollars for the Kenyan economy , Mombasa features a large port that is used for transportation by neighboring landlocked countries . Any prolonged unrest could affect regional trade . The violence could also derail efforts to rebuild the region 's international reputation , after the coastal area outside the city saw a string of kidnappings of western foreigners last year . A U.N. report in July said that Rogo `` threatened the peace , security , or stability of Somalia , by providing financial , material , logistical or technical support to Al-Shabaab . '' It also claimed that he was a key recruiter of Kenyan Muslims to fight with Al-Shabaab , the al Qaeda-linked militant group that is trying to overthrow the Somali government .
One police officer is killed when protesters throw a grenade in Mombasa . Aboud Rogo Mohammed was accused of killing Al - Qaeda militants in Somalia . Kenya Police are disappointed there will be no trial , a spokesman says . Rogo 's lawyer , Mohamed Said , claims the shooters were Kenyan police .