Lebanese security forces have raided a mobile phone company as part of an international investigation into former prime minister Rafiq Hariri's murder.
Armed security forces took part in the phone company raid
Police say investigators copied data from eight telephone lines and questioned several employees of the company, MTC Touch.
Four Lebanese generals, all pro-Syrian, are held as suspects in the case.
UN investigators last week visited Syria - which had troops there until Hariri's death led to withdrawal calls.
Syria has repeatedly denied involvement in the killing.
Witnesses said they saw several people being led away from the company offices.
The raid follows the arrest on 20 September of four men who sold mobile phones that were used around the time of the assassination, in February this year.
The four were charged with withholding information about a crime.
MTC Touch, a network run by Kuwait-based Mobile Telecommunications Co, did not have a representative available for comment.