Pakistan's largest opposition group says it will meet to decide whether to back a no-confidence vote against the prime minister.
Raja Zafarul Haq, chairman of the Pakistan Muslim League-N, said on Tuesday's meeting would take place in Islamabad.
The possibility of a no-confidence vote against Prime Minister Yousuf Raza Gilani arose on Sunday after the second-largest member of the ruling coalition joined the opposition and deprived the government of a parliamentary majority.
Gilani could rule with a minority coalition but would have to step down if he loses a no-confidence vote in parliament. A no-confidence motion needs a majority to pass.