JERUSALEM, Sept 18 (BBC): No clear winner has emerged from Israel's election, leaving a question mark over who will be prime minister, partial official results confirm.
With about 60pc of votes counted, the party of incumbent Benjamin Netanyahu is neck and neck with that of his centre-left main challenger.
The results indicate that each will struggle to form a majority coalition with smaller parties.
Mr Netanyahu is vying to stay in power for a record fifth term.
The latest results from Tuesday's vote suggest his Likud party won 31 seats, while his opponent Benny Gantz's Blue and White party garnered 32 seats, the Kan public broadcaster says.
A prime minister needs to command a 61-seat majority in the Knesset (parliament).
Mr Netanyahu, Israel's longest-serving prime minister, has been in office for 10 years.
The 69 year old has pledged to annex Jewish settlements and a swathe of other territory in the occupied West Bank if he is returned to power.
Palestinians, who seek a state in the West Bank and Gaza, with its capital in occupied East Jerusalem, have warned such a move will kill any hopes for peace.
Mr Gantz has not advocated any form of annexation, though his position on the creation of a Palestinian state is unclear. Like Mr Netanyahu, he has ruled out ever dividing Jerusalem.
Official results have been slow to be released, with only 60% of votes counted by 12:53 (09:15 GMT).
They put Blue and White slightly ahead of Likud, with an alliance of Arab parties third, the ultra-Orthodox Shas party fourth and Yisrael Beiteinu, a nationalist party, in fifth place. The tally does not say how this translates into seats in the Knesset.
Based on these reported results, neither leader can form a majority coalition without support from Yisrael Beiteinu.
That party's leader, Avigdor Lieberman, reiterated that he would only support a government comprising both Likud and Blue and White. However, Blue and White has ruled out sitting with Mr Netanyahu in a coalition.
Exit polls earlier presented a similar picture.
The prime minister is well short of being able to form a governing bloc of right-wing and religious parties that are prepared to sit with him. In fact the result leaves him in an even weaker position than he was after April's vote.
It's almost impossible to predict the outcome, with frenetic horse trading on the way and even the chance of parties fragmenting or politicians shifting allegiances. But as it stands, three broad themes seem among the possibilities:
A dominant new governing bloc of the two big rival parties: Likud with Blue and White. This only seems possible without Mr Netanyahu as Likud leader. Needless to say that's a deal breaker for him and, so far at least, for his party
Mr Netanyahu's political rival Avigdor Lieberman miraculously changes his mind and agrees to join a right-wing and religious Netanyahu government - something his voters understood would never happen
A third election - which nobody here has an appetite for.
In the meantime, Mr Netanyahu stays on, but watch this space. For a few weeks.
There was a muted response at Likud's election night headquarters in Tel Aviv.
Hundreds of chairs for party supporters remained empty as activists were kept outside the hall and leaders digested the numbers.
"There is no point starting to work out a coalition based on these numbers as they will change," Likud foreign affairs director Eli Hazan said.
But Blue and White was "cautiously optimistic" that Israel would get new leadership, spokeswoman Melody Sucharewicz told the Times of Israel.
Mr Lieberman prevented Mr Netanyahu from forming a coalition after the previous vote because he refused to back down over a longstanding dispute with religious parties over exempting ultra-Orthodox young men from military service.