At least 22 children below the age of six years have died, and 35 others hospitalised during the past one week in Bihar's Muzaffarpur district due to a mystery disease, officials said.

While four children died at the Sri Krishna Medical College and Hospital (SKMCH), three others died at the Kejriwal Hospital in Muzaffarpur town, they said.

SKMCH paediatrician Braj Mohan said: