BEIRUT (AFP) - Nearly five months after his appointment, Lebanese Prime Minister Najib Mikati on Monday announced the formation of a 30-member cabinet in which Hezbollah and its allies hold a majority. Mikati, a billionaire Sunni businessman, announced his line-up following arduous negotiations over key portfolios including the justice and telecommunications ministries, now controlled by the Syrian- and Iranian-backed Hezbollah alliance. "This government is a government for all Lebanese, no matter what party they support, be it the majority or the opposition," 56-year-old Mikati told a news conference at the presidential palace. But Lebanon's pro-Western opposition bloc, led by former premier Saad Hariri, has boycotted the new cabinet which it has slammed as a "Hezbollah government." Mikati's cabinet - which does not include any women - has 19 ministers representing the Shia group Hezbollah and its allies. The remaining 11 were chosen by Mikati, President Michel Sleiman and Druze leader Walid Jumblatt. The government must now be approved by at least half of the members of Lebanon's 128-seat parliament, in which the Hezbollah-led alliance has a small majority. In a sign of simmering discord between Mikati and the Hezbollah alliance, Druze MP Talal Arslan immediately resigned from his post as state minister in the new cabinet, accusing the premier of being a "liar" and of seeking to deprive the minority Druze of key cabinet posts. One of the main challenges facing the new cabinet will be how to deal with a UN-backed investigation into the 2005 assassination of ex-premier Rafiq Hariri. Hezbollah forced the collapse of the previous government headed by Hariri's son after he refused to disavow the Special Tribunal for Lebanon. The Netherlands-based court is widely expected to indict Hezbollah operatives in the killing, a move the militant group has repeatedly warned against.