Prime Minister Datuk Seri Najib Tun Razak said he is appalled by the barbaric and cowardly attack on innocent concert-goers in Manchester.

"My deepest condolences and prayers are with the families and friends of those affected," he said on Twitter and Facebook today.

Najib said that at this time of heartbreak, Malaysia stood united with Britain.

"We must be firm, determined and ready to confront terror swiftly and decisively wherever and whenever it manifests itself. We must never surrender," the prime minister said.

It was reported that at least 22 people, including children, were killed and 59 wounded in an attack that occurred as people were making their way out of a concert in Manchester, England.

The incident was being treated by the police as a terrorist attack, according to reports.

-- BERNAMA