JERUSALEM (REUTERS) - Two key right-wing ministers in Israel's outgoing coalition government vowed on Tuesday (June 21) to prevent a comeback by former premier Benjamin Netanyahu as the country braced for a fifth election in three years, with polling predicting no clear winner.

Sapped by infighting that ended his razor-thin parliamentary majority, Prime Minister Naftali Bennett on Monday announced he would move to dissolve the Knesset, with Foreign Minister Yair Lapid assuming top office in a caretaker capacity.

That collapse - and the prospect of an election as early as October - delighted Netanyahu, Israel's longest-serving leader who was toppled a year ago after Mr Bennett mustered a rare coalition of hard-right, liberal and Arab politicians.

He said on Monday night his Likud party would lead the next government, declaring: "Something great happened here."

Surveys have consistently given Likud around 30 of Parliament's 120 seats, which would make it the biggest party but would require Netanyahu to sign up like-minded allies, including among current partners in Mr Bennett's coalition.

Two of those - Finance Minister Avigdor Lieberman and Justice Minister Gideon Saar - ruled out joining forces with Netanyahu, who is on trial on corruption charges he denies.

"I won't be bringing Bibi (Netanyahu) back. All of the party members are with me. No one will succumb to inducements (to defect to Likud)," Mr Saar told Army Radio.

Mr Lieberman said at a conference that coalition lawmakers may link the motion to dissolve the Knesset to a Bill that would prevent anyone under criminal indictment from heading a government.

In his last two years in office, Netanyahu's legal woes denied him the solid right-wing coalition he sought through four elections.

A poll aired by Tel Aviv radio station 103 FM on Tuesday found that Netanyahu and likely rightist or ultra-Orthodox Jewish allies could command 59 Parliament seats in the next vote, versus 55 predicted for parties in the current coalition.

An Arab party not expected to back either bloc got six seats.

The eventual political map could change, however, if smaller parties disappear or join forces, or if Netanyahu or Mr Lapid - whose centrist Yesh Atid party is polling in second place - manage to reach across to less-likely partners.

The election announcement had no immediate impact on financial markets, which are used to the political uncertainty.

The main indexes on the Tel Aviv Stock Exchange were slightly up and the shekel was stronger against the dollar.