A string of explosions struck near a Shia shrine and cemetery in Kabul as people gathered there on Thursday morning to mark the holiday of Nowruz, the Persian New Year, leaving at least five dead and as many as 20 wounded, Afghan officials said.

The police's initial investigation indicated that three explosive devises had been remotely detonated, setting off the successive blasts, according to the Interior Ministry's spokesman Nasrat Rahim.

No group immediately claimed responsibility for the bombing but the Islamic State affiliate that has taken root in Afghanistan has targeted the country's minority Shia Muslims on numerous occasions in the past. The Sunni militant group considers Shiite Muslims heretics.

Kabul's Emergency Services director Mohammad Asim said two children were among the wounded in the blasts. The extent of their injuries was not immediately known.

Shia worshippers had gathered at the Karti Sakhi shrine in the Afghan capital's western neighborhood when the blasts took place. The neighborhood is mostly populated by Shias. The tradition at the shrine is to hoist green flags and honor the dead at the cemetery by placing food at the gravesides.

Wary Afghans had been warned by authorities of violence ahead of the Nowruz celebrations. The holiday, dating back to at least 1700 B.C. and incorporating ancient Zoroastrian traditions, is the most important event in the Iranian calendar and is widely celebrated across the territories of the old Persian empire, from the Mideast to Central Asia.