The Opposition leader has confirmed that he was not being serious and that he and the rest of the opposition were politically immature, the Nationalist Party said.

Referring to Dr Joseph Muscat's hastily called press conference this afternoon in which he accused the Prime MInister of calling the police to investigate a claim made of somebody having asked money during the consideration of the call for tenders only after he raised the case in Parliament.

In a statement, the PN accused Dr Muscat of having kept allegations on a tender process to himself, rather than passed them on to the police.

He also held a news conference just before going abroad to avoid interrogation.

The PN said that while last Thursday Dr Muscat hold a news conference during which he presented 15 points on what politicians should do, this week he threw away what he himself had proposed.