JERUSALEM (AP) - Israeli Foreign Minister Avigdor Lieberman has announced he is resigning a day after an indictment for breach of trust was filed against him by the country's attorney general.

Lieberman's decision could throw the Israeli political system into upheaval a month ahead of elections.

Israel's attorney general indicted Lieberman on Thursday for alleged breach of trust, but decided not to file a number of more serious charges in a fraud and money-laundering case.

"I have decided to resign from my position as foreign minister and deputy prime minister," Lieberman wrote in a statement released by his office on Friday.