Holi celebrations in Mumbai were marred on Thursday when over 170 people, mostly children, suffered colour poisoning and many were hospitalised following allergic reaction in Dharavi area.

"Altogether 170 cases of colour poisoning came to the hospital and over 50 people who have been affected the most, have been admitted," a hospital source said.

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The incident occurred in Shastrinagar area of Dharavi on Thursday afternoon when Holi celebrations were in full swing.

Several people developed allergic reaction to the colours and were rushed to the Lokmanya Tilak municipal general hospital at Sion.

"The affected persons complained of giddiness and vomiting," a hospital official said.

Some cases were serious on admission but are now stable after treatment, he added.

Those hospitalised include children aged 9-10 years.