The US Central Command Twitter account appeared to have been hacked on Monday by people claiming to be Islamic State sympathisers. Report by Claire Lomas.
Pentagon commanders say a cyber attack on the US military's social media accounts is embarrassing - but not a security threat. A group, which apparently backs the Islamic State of Iraq and the Levant, got into Centcom's Twitter and Youtube accounts. Al Jazeera's Rosiland Jordan reports from Washington