China ? One week after a flood trapped 153 workers in a northern Chinese mine, rescuers who have worked around the clock said today they had not given up hope of finding survivors.

But no decisions have been made yet on a next step after a dive team entered the mine Saturday and called the situation underground “very difficult,” with black, murky water complicating efforts to reach sites where rescuers hope miners have survived.

No further signs of life have been heard after apparent tapping was heard Friday, said Wen Changjin, an official with the news center set up at the mine in the northern province of Shanxi.

Wen said the next step in the rescue plan had not been decided.

Rescue and medical workers stood by today at the Wangjialing mine, where 3,000 people have been working around the clock to pump out water that poured in when miners digging tunnels broke into an abandoned shaft on March 28.