China is preparing to send underwater robots to investigate the hull of a sunken Iranian tanker that has created oil slicks covering 100 sq km of ocean, marking one of the worst shipping disasters in recent years.
The underwater operation, which will also involve surface vessels and divers, could attempt to plug holes in the hull that are leaking oil, according to the Shanghai Maritime Search and Rescue Centre.
The effort to explore the wreck comes as authorities race to limit environmental damage from the spill.
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