Daesh on Saturday claimed the knife attack against patrolling soldiers a day before in Brussels, an assault that came just hours before a sword-wielding assailant wounded police outside London's Buckingham Palace.
The knifeman in Brussels, who hurt a soldier on Friday in what authorities said was an "attempted terrorist murder", was shot dead, while police in London overpowered a man who injured three unarmed officers outside the royal residence with a four-foot (1.2-meter) blade.
The 26-year-old man in the London violence has been arrested under the Terrorism Act, which allows for 14 days of pre-charge detention, and is being held at a police station in the British capital.
The two attacks come as much of Europe is on high alert following a string of deadly assaults over the past two years -- most of which have been claimed by terrorists.
Last week, Spain was hit by twin vehicle attacks which left 15 dead, and two people were killed in a stabbing spree in Finland.
"The perpetrator of the stabbing operation in Brussels is one of the soldiers of Daesh," the organi One of the soldiers was slightly hurt in the attack which Brussels Mayor Philippe Close said had been carried out by a "lone individual". Overnight, police raided the suspect's home in Bruges, northwest Belgium. 'Four-foot sword' During the attack near the Grand Place in central Brussels at 8:00 pm (1800 GMT), the man rushed at several soldiers from behind and struck them with a knife, prompting one of them to open fire. "The man was hit and died shortly afterwards in hospital from his wounds," the prosecutors' statement said. The assailant was a Belgian national of Somali origin who was born in 1987, authorities confirmed. He arrived in the country in 2004 and was granted Belgian nationality in 2015. Although not known for any terror-related activities, he had an assault and battery charge on his record from February, the statement said. Less than two hours later, a man drove his car at a police van outside Buckingham Palace. The attacker reached for a four-foot sword and had to be incapacitated with CS gas, police said in a statement on Saturday. Three officers were slightly injured in the incident. No members of the royal family were in the residence at the time of the attack. The man's identity has not been disclosed but police said he was from Luton, a city 30 miles (50 kilometers) north of London. "Officers from the Counter Terrorism Command are now investigating and searches are being carried out in the Luton area today," the police said in a statement. "We believe the man was acting alone and we are not looking for other suspects at this stage." With much of Europe on edge over the attacks, many of them low-tech assaults using knives or vehicles as weapons, thousands of people took to the streets of Barcelona on Saturday in a defiant march under the slogan "No tinc por" -- Catalan for "I'm not afraid". 'Soldier bleedingtarget="_blank"'>