TAIPEI - Taiwan prosecutors are still investigating the cause of an underground gas explosion which left 30 dead and 310 injured.

The blasts hit the southern city of Kaohsiung at about midnight on July 31, ripping up roads and overturning cars.

Kaohsiung Major Chen Chu said on Wednesday that the city government will go to court to apply to freeze the assets of LCY Chemical Corp..

LCY is suspected of being responsible for the accident after the initial investigation.

Supplies of water to 560 households, electricity to more than 600, and gas to 4,000 are yet to be restored.

Gas leaks were reported in the city's Cianjhen District at 8:46 p.m. on July 31, leading to multiple blasts at about midnight that affected a three square km area.