The three Malaysian students who were questioned by the Greater Manchester Police in relation to the Manchester bombing were purportedly “traumatised” by the experience.

Quoting a Malaysian High Commission officer who visited the students yesterday, the New Straits Times Online reported that despite being traumatised, they were otherwise fine.

Meanwhile, a National Crime Agency spokesperson would not reveal the reason for the arrest and only said the case was under investigation.

Wisma Putra yesterday confirmed that the students were arrested at about 5.40pm at their rented home on Monday and released three and a half hours later.

Security services in the United Kingdom have been carrying out raids and arrests as part of their investigations into the Manchester bombing.

The home of the three students was raided during one of the operations.

United Kingdom's The Times reported that the bomber, Salman Abedi, “may have taken advantage of their (the students’) hospitality while he was planning his attack”.

Among the questions allegedly asked during the questioning were whether the students knew Salman, whether they had met him, and whether they symphatised with his cause.

Police had purportedly confiscated their mobile phones and computers for further investigation. The students’ friends are however worried as one of the students will be sitting for an examination this week.

A Facebook message circulated within the student community claimed the three students were being housed at a safehouse as their rented home had been cordoned off, with police officers guarding the property.

A Malaysian High Commission officer said male Muslim occupants of neighbouring houses had also been arrested and questioned.

A total of 22 people, including children, were killed and 116 injured when the British national suicide bomber detonated a shrapnel-laden improvised explosive device at the exit of the Manchester Arena, after a concert by American singer Ariana Grande.

So far, 16 people have been arrested in connection with the incident.