Antisemitic march in London: over 300 detained, including a terrorist

Former Guantánamo detainee Moazzam Begg was arrested in London on suspicion of supporting Palestine Action, an organization recently banned by the British government under anti-terrorism legislation.

Begg was released without charge in 2005 after spending five years in U.S. custody, accused of belonging to al-Qaeda.

In 2014, he was detained again for alleged involvement in terrorist activities related to the conflict in Syria, although the charges were later dropped.

Begg's arrest took place as part of a large police operation in which London's Metropolitan Police arrested more than 365 people protesting against the proscription of Palestine Action.

Protesters gathered in Parliament Square carrying banners in support of the group, which constitutes a crime since the ban came into effect.

Authorities also reported the arrest of seven additional people for other offenses, including five arrests for assaults on officers. None of the officers were seriously injured.

According to the Metropolitan Police, crowds attempted to breach police cordons during the protest.

In July, the British Parliament added Palestine Action to the list of proscribed organizations after some of its members broke into a Royal Air Force (RAF) base and damaged aircraft in protest against the United Kingdom's support for Israel.

The law stipulates that being a member of a banned group can result in up to 14 years in prison.

Despite the ban, the organization's co-founder, Huda Ammori, obtained judicial authorization last week to file a legal challenge against the measure.

The protest adds to a series of recent demonstrations. Since the ban came into effect last month, more than 200 people have been arrested in marches organized by the Defend Our Juries movement following the attack on the RAF base.