UN Secretary General Kofi Annan expressed his concern Sunday about the situation in Gaza after early morning's bombing of Palestinian prime minister's office by Israeli troops.

Annan said he was particularly concerned the bombing of Palestinian prime minister's office and the arrests of Palestinian legislators.

"I remain very concerned about the need to preserve Palestinian institutions and infrastructure," said Annan during a press conference on the sidelines of the seventh AU summit held here on Saturday and Sunday, adding that "they will be the basis for an eventual two-state solution, which was in the interest of both Israelis and the Palestinians."

Annan said that it seems inadvisable to carry out actions that will have the opposite effects.

Israeli forces on early Sunday carried out three air strikes in Gaza, one of which targeted the office of Palestinian Prime Minister Ismail Haniya.

Source: Xinhua