A group that claims to have links with al-Qaeda has said it carried out the series of bomb attacks in London.
The unverified claim, made on the Al-Qal'ah - Fortress Internet site said that "Britain is burning with fear". It was posted by a group calling themselves the Secret Organisation Group of Al-Qa'ida of Jihad Organisation in Europe.
The message said: "The heroic mujahidin have carried out a blessed raid in London."
It continued: "Britain is now burning with fear, terror and panic in its northern, southern, eastern, and western quarters."
The claims, picked up by BBC Monitoring, claimed the strikes were revenge for British military "massacres" in Iraq and Afghanistan.
Terrorists appeared to warn Denmark and Italy that they will also suffer attacks if they do not withdraw troops from Iraq.
The message went on: "In the name of God, the merciful, the compassionate, may peace be upon the cheerful one and the dauntless fighter, Prophet Muhammad, God's peace be upon him.
"O nation of Islam and nation of Arabism: Rejoice for it is time to take revenge from the British Zionist Crusader Government in retaliation for the massacres Britain is committing in Iraq and Afghanistan."
Elaph, a secular Arabic-language news website, and Der Spiegelmagazine in Berlin, both reported that a group calling itself The Secret Organisation of al Qaida in Europe had posted a claim of responsibility for the series of blasts, saying they were in retaliation for Britain's involvement in Iraq and Afghanistan.
PA