A powerful underground tremor and methane gas discharge hit a second coal mine Saturday in southern Poland, forcing dozens of workers to flee the mine and leaving authorities unable to contact 10 other miners still missing, officials said.
The accident at 3:40 a.m. Saturday at the Borynia-Zofiowka mine occurred 900 meters (2,950 feet) underground. It was the second colliery accident in just four days in the coal mining region around the town of Jastrzebie-Zdroj, near the Czech border.
