A secular bloc which won the most seats in Iraq's March 2010 vote will end a boycott of parliament that it began in mid-December, a spokeswoman said on Sunday.

"Iraqiya decided its deputies would return for parliament meetings," Maysoon al-Damluji told a news conference after a gathering of Iraqiya leaders and MPs.

The session was attended by Iraqiya leaders including former premier Iyad Allawi, deputy prime minister Saleh al-Mutlak, parliament speaker Osama al-Nujaifi, and the finance minister, Rafa al-Essawi.

"The deputies of the Iraqiya list will return back to participate in the meetings of parliament next Tuesday. That's what we decided today," MP Aytab al-Duri told reporters.

The decision has not, however, been taken to end a boycott of cabinet sessions by Iraqiya ministers, according to Duri, who said "that will be the next step."

A row erupted over a month ago between the Shiite-led government and the Iraqiya bloc as authorities charged Vice President Tareq al-Hashemi, a Sunni and Iraqiya member, with running a death squad.

Iraqiya began a boycott of parliament and cabinet to protest what it charged was Prime Minister Nuri al-Maliki's centralisation of power, and it has since called for Maliki to respect a power-sharing deal or quit.

Authorities have issued an arrest warrant for Hashemi while Maliki, a Shiite, has said his Sunni deputy Saleh al-Mutlak should be sacked after the latter said the premier was "worse than Saddam Hussein".

Hashemi, who denies the charges, has since been holed up in the autonomous Kurdish region of northern Iraq and Kurdish officials have so far declined to hand him over to Baghdad.