British counter-terrorism police on Saturday arrested three people suspected of involvement in the killing of a soldier hacked to death in a London street by two men shouting Islamist slogans. The killing of the soldier in what the government said appeared to be a terrorist attack has led to angry protests against radical Islam and fears of a possible anti-Muslim backlash. Michael Adebolajo, 28 and Michael Adebowale, 22, are under armed guard in hospital after being shot and arrested by police on suspicion of murder on Wednesday. The three men arrested on Saturday are suspected of conspiracy to murder. London police said two of them were hit by electric Taser guns, but neither needed hospital treatment. Eight people have now been arrested in connection with the murder on Wednesday of 25-year-old Lee Rigby, who served in Afghanistan. No one has been charged. Witnesses said Adebolajo and Adebowale used a car to run down Rigby outside Woolwich Barracks in southeast London and then attacked him with a meat cleaver and knives, before being shot by police. The pair told bystanders they were acting in revenge for British wars in Muslim countries. French police were investigating whether the stabbing of a soldier patrolling a business district west of Paris on Saturday was a copycat crime. The soldier was injured and his attacker fled.