[quote]And US Vice-President Joe Biden said there was "no doubt" the Syrian government was responsible. ][/quote] [quote]David Cameron has discussed Syria with Barack Obama by telephone as Britain and the US consider intervention. The UK's response will be discussed at a National Security Council (NSC) meeting later, while the US has said its forces are "ready to go". The prime minister said on Tuesday the world could not "stand idly by" as the Syrian government used chemical weapons against its own people. But Syria's foreign minister denied his government had used chemical weapons. The government blamed opposition fighters for last Wednesday's alleged chemical attack near Damascus, which reportedly killed more than 300 people. UN weapons inspectors are to return to the site of the suspected attack later. BBC defence correspondent Caroline Wyatt said any military strikes would probably focus on command centres believed to be involved in the use of chemical weapons. She said cruise missiles could be launched from US ships in the Gulf or the Mediterranean, or Royal Navy vessels including submarine HMS Tireless. [/quote]