Gunman holding hundreds of hostages in a Moscow theatre have shot dead two more of the captives, a Russian security officials said early on Saturday.
The officials said hostage-takers have started killing more hostages, adding foreigners were among those killed.
In the past two hours, the rebels killed two men hostages and injured two, including one women wounded in stomach and one man inhead, Pavel Kudryavtsev, an official from the emergency center overseeing the hostage drama told reporters outside the theatre.
At around 0210 Moscow time (2210GMT), two hostages were taken out and put in an ambulance.
Unconfirmed reports said they were the two who are wounded. An Interfax reporter there said gunshots were heard inside the theatre before they were taken out.
Hours later, heavy gunfire and three powerful explosion were heard from inside the theatre.
Kudryavtsev said the rebels set off the gunfire and explosions,and the federal security forces had taken no response action.
He also said the emergency center had been trying to contact the leader of the hostage-takers, but has received no clear reply so far.