US officials are searching the internet for the reappearance of a website used by al-Qaeda terrorists.
The Arabic website, recently known as alneda.com, is used by the group to deliver messages to its operatives around the world.
The site is one of the terrorist group's main instruments in its efforts to regroup, claims senior US law enforcement officials.
It is registered in Singapore and appeared on web servers in Malaysia and Texas earlier this month before it was taken off at the request of the US government.
They now expect it to reappear under a numerical address in a bid to fool FBI and CIA specialists who are trying to locate it.
The alneda.com site contained audio and video clips of Osama bin Laden, pictures of suspects detained in Pakistan.
Investigators also say it recently contained a message claiming to be from the group's spokesman Sulaiman Abu Ghaith in which he warned of more attacks against the US.
Mr Ben Venzke, an expert on cyber-terrorism, said: "Alneda.com is one of the only sites, if not the only site, for statements by al-Qaeda and the Taliban.
"I expect it to reappear as quickly as it goes down and keep shifting."
PA