A suspected suicide car bomb exploded at the gate of a hotel in the Somali capital Sunday, a police officer said. There was no immediate claim of responsibility but the Islamist militant group Al-Shabab frequently launches bomb and gun attacks against officials and others in the capital in its bid to topple Somalia's Western-backed government. "A suicide car bomb exploded at the gate of Jazeera Hotel," Major Nur Osoble, a police officer, told Reuters, adding it was too early to know if there were any casualties. Ambulances sirens sounded and sounds of gunfire were heard.