The Lebanese army forces have arrest four people in the building where Hamra suicide attacker, Omar Hassan Assi, used to live in al-Sharhabil area in Sidon. 
The army statement did not identify the suspects but the National News Agency had reported that two of Assi's brothers and relatives from the Bukhari and Habli families were arrested overnight. 
The military also said that Assi's suicide belt contained "eight kilograms of extremely explosive material and a number of metallic pellets aimed at maximizing casualties". 
"The detainees are being interrogated under the supervision of the relevant judicial authorities," the army statement added. 
Army intelligence agents had arrested Assi overnight Saturday at the Costa cafe in Beirut's Hamra district. Several military intelligence agents were seen holding him down to ensure he was not able to detonate the explosive belt.

Source: QNA