Rebel forces in Libya say they are closing in on Moammar Gadhafi as they besiege a cluster of Tripoli apartment buildings where they believe he is hiding with several of his sons. “They are together. They are in a small hole,” said Muhammed Gomaa, a rebel fighter on the scene. “Today we will end that.” The rebels exchanged fire with Gadhafi loyalists who were inside the apartment buildings, which are situated near the leader’s Bab al-Aziziya compound that was captured and ransacked earlier this week. It remains unclear why the rebels believe Gadhafi to be in the apartment buildings. Meanwhile, a Canadian rebel fighter has reportedly been killed in Tripoli. Edmonton-born Nader Ben Raween, 24, was an information technology worker living in Ottawa, the CBC reports. In March, Raween quit his job and travelled to Libya to support the rebel forces in their fight against Gadhafi loyalists. Raween was shot dead by Gadhafi forces on Tuesday.