India, Aug. 10 -- More than 600 pilgrims in Iraq were hospitalised following a chlorine gas leak at a water treatment station, authorities said Sunday.

The pilgrims were on the route between two Shiite holy cities of Najaf and Karbala when the incident took place, AFP reported.

"621 cases of asphyxia have been recorded following a chlorine gas leak in Karbala," Iraq's health ministry said in a statement. The ministry further said that all those hospitalised had received the "necessary care" and left the hospital in good health.

The incident, which happened overnight, was caused due to a "chlorine leak from a water station on the Karbala-Najaf road", security personnel responsible for the protection of the pilgrims said.

Several millio...