London Bridge attack – What do we know so far

At least six people were killed by militants who drove a van at high speed into pedestrians on London Bridge and then stabbed revelers in the nearby Borough Market area on Saturday.
For the main story on the attack:
All three attackers were shot dead by police. More than 30 injured people were taken to hospital.
The following is what is known so far:

– Three attackers drove a white van at high speed into pedestrians walking on London Bridge, police said.
A witness told Reuters that at least six people were hit on the bridge.
“It looked like he was aiming for groups of people. I froze because I didn’t know what to do,” Mark Roberts, a 53-year-old management consultant, told Reuters. “It was horrendous.”
Police said they responded to the incident on London bridge at 2208 (2108 GMT).

– The men armed with knives left the vehicle and attacked people in the nearby Borough Market area on the south side of the Thames, witnesses said.
Witnesses said the attackers stabbed people in the street and in pubs and restaurants in Borough Market.

– Police said armed police had responded to the reports of stabbings in Borough Market and shots had been fired.
“Armed response officers then responded very quickly and bravely and confronted the three male suspects who were shot and killed on Borough Market,” Mark Rowley, Britain’s top anti-terrorism officer, said.
“The suspects had been confronted and shot by police within eight minutes of the first call. The suspects were wearing what looked like explosive vests but these were later established to be hoaxes,” he said.
The men were wearing what appeared to be canisters attached to their bodies. One of them was shown in a photograph lying on the ground outside the Wheatsheaf pub.
Another man, was also reported to be an attacker, was pictured on the ground a short distance away. Witnesses said they heard gunfire in the area.
The police said the vests were later established to be hoaxes. A Reuters reporter nearby said he heard loud bangs afterwards that may have been controlled explosions.

– Terror attack? At 0025 British time on Sunday the incidents at London Bridge and Borough Market were declared as terrorist incidents.
“Following updates from police and security officials, I can confirm that the terrible incident in London is being treated as a potential act of terrorism,” Prime Minister Theresa May said just over four days before voting is due to begin in a June 8 national election.