Two fathers' rights campaigners were charged Thursday after they threw two condoms full of purple-colored corn flour at British Prime Minister Tony Blair during his weekly question time in parliament Wednesday.

Patrick Ronald Davis, 48, and farmer Guy Richard Harrison, 36, were charged under the Public Order Act with "using threatening, abusive or insulting words or behavior, or disorderly behavior, likely to cause harassment, alarm, or distress."

Both of them are members of Fathers 4 Justice, a group which campaigns for separated and divorced fathers. They are now released on bail and will appear in court in London next Wednesday,Scotland Yard said in a statement.

British intelligence service MI5 have launched a thorough parliamentary security review following the incident, which, according to Peter Hain, Leader of the Commons, was a "wake-up call" and a "very embarrassing lapse."

Hain told BBC Radio earlier Thursday that the attack could have"been ricin or anthrax ... and killed ... large numbers of members of parliament."

The incident happened after a 600,000 pound (1.08 million US dollars) bullet-proof security screen was installed in the chamber of the House of Commons at Easter.

New security measures costing five million pounds, are also being introduced, including a new entrance to the Palace of Westminster, according to a BBC report.

Source: Xinhua