Police in London said Friday they had arrested four men in connection with an alleged Islamist plot, which media reports said was planned for British soil.

The men, aged 19, 22, 25 and 27, were arrested overnight "on suspicion of being concerned in the commission, preparation or instigation of acts of terrorism," Scotland Yard said.

Britain will send more security personnel to Iraq to help train forces for their battle against the Islamic State jihadist group, Defense Secretary Michael Fallon said on Wednesday.

The United Kingdom, which is supporting U.S.-led air strikes aimed at driving IS jihadists out of significant parts of Iraq, is already training Kurdish forces in the country.

British police arrested an 18-year-old man on suspicion of planning a bomb attack and evacuated 50 people from a housing estate on Monday.

Officers from an army explosives squad were sent to the housing estate near the Newcastle United stadium in northeast England after "suspicious items" were found.

A Tehran court has jailed for one year a British-Iranian woman who was arrested after trying to attend a volleyball match, in a decision condemned Sunday as an outrage.

The case of Ghoncheh Ghavami, a 25-year-old law graduate from London, has drawn considerable attention because of her dual nationality and lengthy time in prison before trial, with Britain saying Sunday that it was concerned.

A British court on Thursday ruled that a Libyan politician can sue the government over his claim that Britain conspired with the CIA in his "rendition" to Libya for torture in a case that could pave the way for similar legal action.

The Court of Appeal ruling overturns a previous court decision in December that said that while Abdul-Hakim Belhaj and his wife had a "well-founded claim" the case was beyond the jurisdiction of British courts.

The father of British photojournalist John Cantlie has died, a fortnight after making a impassioned appeal to Islamic State militants to release his son, the family said on Wednesday.

Paul Cantlie died on Thursday aged 80 from "complications following pneumonia", the family said in a statement.

Britain's security services are monitoring "thousands" of people in London, the city's mayor Boris Johnson said in an interview Saturday, amid heightened fears of attack by homegrown jihadists.

Johnson's comments came as Scotland Yard continued to question five men arrested in the capital on Tuesday on suspicion of planning a terrorist act.

Police in London on Thursday said they had arrested a fifth British man on suspicion of Islamist-linked "terrorism" after saying earlier they had managed to avert a "significant plot."

The 20-year-old was arrested "on suspicion of being concerned in the commission, preparation or instigation of acts of terrorism," the Metropolitan Police said in a statement.

Bahrain has rejected claims implicating its Prince Nasser bin Hamad al-Khalifa in acts of torture after a British court denied him immunity from prosecution over any such allegations.

A British judge on Tuesday ruled Bahrain's Prince Nasser bin Hamad Al-Khalifa does not have legal immunity from prosecution following a review requested by a Bahraini torture survivor.

"It's a victory for the people of Bahrain," Sayed Al-Wadaei, director of advocacy at the Bahrain Institute for Rights and Democracy campaign group, told AFP after the hearing.