The United States has condemned a series of bomb attacks by dissidents in the Iranian capital, Tehran, which Iranian officials said had left three people dead and six wounded.

The US State Department said it strongly condemned what it called terrorist attacks wherever they occur.

The Iranian guerilla group, the Mujahadeen Khalq, which said it carried out the bombings, accused Washington of conducting a policy of appeasement.

The official Iranian news agency said three people -- two of them children -- had been killed in the first bombing, at a court building; a second bomb at a military building had caused no casualties, and a third attack at the Tehran headquarters of the Revolutionary Guards had been foiled.