PESHAWAR, Oct 5: The city police on Tuesday arrested an Afghan national for threatening to blow up the United Nations High Commissioner for Refugees office in Peshawar last week, officials told Dawn.

All UN offices in the city suspended their activities after the bomb threat on Thursday last. They were later re-opened on Tuesday after getting security clearance from the authorities concerned.

The sources said that an interpreter working at the UNHCR office, Ahmed Farid, had received two telephone calls from an Afghan national, Shah Mohammad, a resident of Logar province of Afghanistan. It was learnt that the man already knew the UN employee.

But during police interrogation, Ahmad Farid did not disclose the caller's name. The accused was identified after the interrogation of a public call office owner on the Nasir Bagh Road, from where he had made two calls.

Shah Mohammad, associated with the UNHCR, told interrogators that he had sought a job from the International Organization for Migration, but was not able to get a job there.