Three Malaysian students in Manchester were detained and questioned by local police.
In a statement Tuesday, the Foreign Ministry said they received reports that the trio were detained and brought to the Longsight police station for questioning at 5.40pm (Manchester time) on May 29.
All three students were later released at 9pm (Manchester time).
"The Ministry wishes to advise the public to remain vigilant and follow the instructions by the local authorities," it said.
It also advised Malaysians living in Manchester to report to the Malaysian High Commission in London at 52, Bedford Row, London, WC1R 4LR; via telephone at +44 (0) 207 242 4308 or via email at email@example.com.
On May 29, Manchester police noted that 16 people had been arrested since a suspected suicide bombing killed 22 people at a concert at Manchester Arena last Monday.