Lebanese troops stormed an apartment Thursday in northern Lebanon, arresting a suspected member of the al-Qaida-inspired Fatah Islam group, security officials said. Nabil Rahim is believed to be a senior member of Fatah Islam, an extremist group that engaged the Lebanese army in fierce fighting last year in the Nahr el-Bared Palestinian refugee camp in Tripoli, the officials said. Two Tripoli security officials described the arrest Thursday, on condition of anonymity because the investigation was ongoing. Rahim, a Lebanese citizen, was detained along with his wife, the officials said. The couple had been renting an apartment in the city's Abu Samra neighborhood, they said.