Ujjain: Six persons were killed and around 40 others injured on Thursday evening when heavy rain accompanied by lightning and squall wreaked havoc at the site of the ongoing Simhatha Kumbh Mela here, flattening and uprooting pilgrims' tents.

"Six people have been killed and 40 injured in and around the Mela area," district collector Kavindra Kiyawat told PTI. The second Shahi-Snan is due on May 9.