ANOTHER 'mysterious explosion' in Iran:

A mysterious explosion took place in a steel factory in Iran overnight Sunday, killing seven people, the latest in a series of blasts that have rocked the Islamic Republic over the last month.

The deaths occurred in an explosion and subsequent fire at a steel factory in the central Iranian province of Yadz, Iran's IRIB news agency quoted Yazd Governor Azizollah Seifi as saying on Monday. He said that some of the those killed in the blast were foreign nationals.