A new al-Qaeda videotape has been posted on a militant website.
The video, which lasts less than a minute, features a short, undated clip of a weary-looking Osama bin Laden praising martyrdom.
The authenticity of the video could not be verified, but it appeared on a website commonly used by Islamic militants and carried the logo of al-Qaeda's media production wing.
The tape appeared as the the United States Senate voted to double the reward for the death or capture of Mr bin Laden from $25m to $50m.
