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Yaakov Katz and Reuters contributed to this report.

Residents of Tehran reported hearing three blasts in the Iranian capital on Tuesday according to an unconfirmed message posted on the Twitter network by a BBC Persian correspondent.The journalist, Kasra Naji, quoted residents of the city as saying that the explosions occurred in an area of west Tehran where Iran “maintains its missile research and depots.”Later, an Iranian website said the blasts occurred at a privately owned chemical factory.In January, both Iran and the International Atomic Energy Agency denied an unconfirmed claim that a blast had hit the Fordow underground uranium enrichment center near Qom.In November 2011, a mysterious and massive explosion rocked a military arms depot near Tehran, killing 17 officers of the Revolutionary Guards Corps – among them Iran’s highest missile commander, Maj.-Gen. Hassan Moghaddam. The blast wounded 17 others.Iranian officials claimed the blast was caused by an accident as soldiers moved munitions at the base in Bidganeh, near Shahriar, 45 kilometers west of the Iranian capital. The base is believed to house some of Iran’s most advanced longrange ballistic missiles, such as the Shahab-3.In October 2010, a blast occured at a Revolutionary Guards munitions store in Khoramabad in western Iran, killing and wounding several servicemen.