Britain is planning to join forces with America and prepare its Royal Navy vessels against Syria, The Daily Telegraph is reporting.
Government sources said talks between the Prime Minister and international leaders, including Barack Obama, would continue, but that any military action that was agreed could begin within the next week.
The possibility of such intervention will provoke demands for Parliament to be recalled this week.
More top news
The makers of the latest Star Wars film have released more teaser footage of the upcoming blockbuster.
Premier League referee Michael Oliver stepped into the breach when an official was injured during a women's Intercontinental Cup match.
Tyler the Creator, the US rapper and Odd Future collective co-founder, has been banned from the UK.