Grenade attacks kill one, injure 33 in Kenya April 1, 2012 -- Updated 0827 GMT (1627 HKT) Red Cross reports two grenade attacks -- one in Mombasa, one in nearby Mtwapa Kenya has been on edge since it sent its troops into Somalia to pursue Al-Shabaab militants The attacks occur in communities along the Indian Ocean Nairobi, Kenya (CNN) -- Two separate grenade attacks hit the Kenyan coast Saturday night, killing one person and wounding at least 33 others, officials said. One grenade in the southeastern town of Mtwapa killed one person and injured 31 others, said Nelly Mulluka, a spokeswoman for the Kenya Red Cross. A second grenade hurled into a stadium in the coastal city of Mombasa injured two others, she said. The attacks occurred in communities along the Indian Ocean, southeast of the Nairobi capital. The East African nation has been on edge since it sent its troops into Somalia to pursue Al-Shabaab militants after the abductions of tourists and aid workers in Kenya. It blames the abductions on Al-Shabaab, which has denied involvement. Al-Shabaab, which the United States considers a terror group, has threatened to attack Kenya if it does not withdraw its forces from Somalia. No one has claimed responsibility for the attacks. CNN's David McKenzie and Samira Said contributed to this report