At least four incidents of wall collapse were reported in Maharashtra's Thane city following heavy overnight rains, but no one was injured, while one person was feared drowned in a swollen drain, a civic official said on Sunday.

Four auto-rickshaws were damaged in one of the wall collapse incidents, Thane Municipal Corporation's regional disaster management cell chief Santosh Kadam said. Water-logging was reported at 18 places in Thane city and in some parts of neighbouring Mumbra, Bhiwandi and Kalyan townships after heavy overnight showers, he said.