Minister without portfolio Ami Ayalon announced his resignation from Labor Sunday morning, claiming that the center-left party has lost its will to live.

"The Labor Party is a body that does not seek political life, and does not fight for its life," said Ayalon, speaking at a press conference.

Ayalon, a former head of the Shin Bet security service, is reportedly considering taking over as head of Michael Melchior's left-wing religious Meimad party. This would be with the intention of becoming part of a larger alliance with Meretz or with the new leftist party launched on Friday.

The minister is also believed to be considering joining the Kadima party.

Speaking to a group of activists at Kibbutz Sdot Yam on Saturday, the minister said that, "The Labor Party is a party with no ideals, regulations or laws, and it is a party I will not be a part of."

He also leveled criticism at his rival, Labor Party chairman Ehud Barak.

"I was ready to be number two in a movement in which there is shared leadership, but with Barak there was no such thing in the past and will not be such a thing in the future," Ayalon said.

Senior Labor Party officials said Ayalon would have to resign from his post as minister without portolio, but sources close to Ayalon said he intends to complete all his tasks, including working toward the release of kidnapped solider Gilad Shalit.

Meanwhile, Army Radio reported Sunday that MK Zeev Elkin has informed Kadima chairwoman Tzipi Livni of his intention to leave the party. Elkin is considering joining one of the right-wing parties, including Likud.