Bam, Kerman prov, April 9, IRNA -- A 3.9 Richter quake hit the city of Bam, southeastern Iran Thursday evening.

The mild earthquake rocked Bam at 18:53 local time, according to Kerman Seismological Base, affiliated to Tehran University Geophysics Institute's Seismological Center.

No report is yet available on likely death toll or damage. Another quake measuring 6.3 on Richter scale rocked the city of Bam on December 26, which killed tens of thousands and razed the city to the ground.

The world's most ancient mud-brick citadel, Arg-e Bam was also completely destroyed.

Iran is situated on some of the world's most active seismic fault lines and quakes of varying magnitudes are of usual occurrence.