HUNTINGTON, Utah &#8212 What next? That was the question remaining after a drill punched a sixth hole through a mine shaft and found no sign of six miners last seen before a massive collapse nearly three weeks ago.

Federal safety officials told families of the missing miners they would conduct testing – air samples, signaling in hopes of a response from the men, and dropping a video camera into the mine shaft – but have been less than hopeful about the results, which were expected to be announced Sunday.

“The only thing they told us is there is no void where the sixth hole is; there is no space,” attorney Colin King said after a meeting between the missing miners’ families he represents and mine officials.

Crandall Canyon Mine co-owner Bob Murray has said this hole, the sixth to be drilled deep into the mountain, will be the last effort to find a sign of the miners, who may not have survived the massive cave-in Aug. 6.

Families have pleaded with Murray not to halt rescue efforts, and King said officials did not rule out the possibility of a seventh bore hole.

“They left the possibility open that they were possibly considering another hole,” King said. “It didn’t sound like that was uppermost on their list of to-dos.”

Drilling on the sixth narrow hole was completed late Saturday afternoon, the U.S. Department of Labor said, reaching a depth of more than 1,700 feet.

Rob Moore, vice president of Murray Energy Corp., co-owner of the Crandall Canyon mine, had no comment on the initial findings from the sixth hole.

Previous holes have yielded only grainy video images and poor air samples. Efforts to signal the miners have been met with silence. Tunneling into the mine was abandoned after another collapse killed three rescue workers and injured six others on Aug. 16.

“It is one of my major goals and the families’ major goal to get them out. . We will vigorously resist any attempt to seal this mine so that we can keep those options open,” said King, who has been retained by most of the miners’ families.

Family and friends of the missing miners have pressed for the efforts to continue, if only to find the bodies of Kerry Allred, Don Erickson, Luis Hernandez, Carlos Payan, Brandon Phillips and Manuel Sanchez.

“At this point, we’re very disappointed at the Murray Energy group of companies, which seem to have given up on these people in the mine. They’ve been unresponsive to our efforts to learn why a large diameter drill hole from above could not have been done and has not been done,” King said.

A report from eight national mine safety experts detailing the rationale against a rescue capsule hole or continued horizontal drilling has not been provided to families, King said.

“It puts us in a very difficult position to be able to credibly say, ‘You should do this’ or ‘You should have done that,'” King said.