The rescue mission to find the four remaining miners was again put on hold Thursday due to unsafe air conditions, reports the New York Daily News.
The mine explosion that occurred on Monday had killed 25 miners in West Virginia, reports The Christian Science Monitor.
Rescuers are hoping the four men are in an airtight chamber which is located underground, reports the New York Daily News.
Investigations into the cause of the explosion and whether or not violations occurred will be lead by Norman Page, reports The Christian Science Monitor.
There were also two mining accidents in China this week. 40 miners were killed in Yinchuan while 115 were saved in China's Shanxi province, reports Reuters.