Two children died after inhaling toxic gas in a septic tank at Baniarchala in sadar upazila on Sunday.
The deceased are Zannat, 3, daughter of Zahirul Islam of Sherpur district, Lily, 4, daughter of Morshed Ali of Mymensingh district.
The two children fell into a septic tank while playing near it sometime in the morning, said Jabedul Islam, in-charge of Joydebpur Police Station.
After a hectic search the parents of the children found the bodies in the septic tank and recovered those with the help of local people in the afternoon.