Beirut  - The first batch of the European Union election observation team has arrived in Lebanon ahead of polls on June 7, a Lebanese security source said Sunday.

"Around 100 members of the EU observers arrived in Beirut overnight Sunday," the source who is based at Beirut international airport told the German Press Agency dpa.

The observers will start on Sunday their orientation at the seaside hotel Moven Pick, the source said.

"Sunday will witness a day where the observers will be briefed on the various locations they will be placed in," he added.

On Monday the delegation will hold a press conference in the afternoon to brief the Lebanese media on their task.

On Tuesday, the head of the European Union electorial observation commission to Lebanon, José Ignacio Salafranca, will meet with the various Lebanese political leaders, including the deputy secretary general of the Lebanese Shiite movement Hezbollah, sheikh Naeem Kassem.

The EU already has a team of 10 experts on the ground in Lebanon paving the way for the observation mission.

The second batch of the observers will arrive to Lebanon a day ahead of the Lebanese election due on June 7.

The EU has already donated 4 million euros (5.2 million dollars) to help Lebanon reform its electoral law. The bloc is set to spend a further 4.7 million euros on the election monitoring mission, the EU's executive, the European Commission.

Lebanon is due to hold a crucial parliamentary election which will witness a heated race between the western-backed ruling majority and the opposition-led Hezbollah. (dpa)