British police dismissed speculation on Sunday that a mass stabbing attack on a London-bound train the previous evening was terrorism-related but said two people who were wounded remain in life-threatening condition.

Police also said that two men, born in the United Kingdom, remain in custody at separate police stations.

They were arrested eight minutes after the first emergency calls were made at 7:42 p.m. from aboard the train, where passengers had reported scenes of panic and chaos with many running through the carriages and some seeking safety in the toilets.

The two arrested remain in custody, he said, adding that one is a 32-year-old Black British man, the other is a 35-year-old man of Caribbean descent.

The relationship of the two suspects was not revealed, nor was the type of knife, or knives, used.