Hundreds of migrant children have been transferred out of a filthy Border Patrol station in Texas where they had been detained for weeks without access to soap, clean clothes or adequate food, the authorities confirmed on Monday, suggesting that worsening conditions and overcrowding inside federal border facilities may have reached a breaking point.Observers said the children who were living there needed diapers, clean clothes and toothbrushes. Facilities with poor conditions have trickled out in recent months Access to the facilities has been largely restricted, however, even as federal authorities have declared that the number of migrants on the border has escalated beyond their ability to safely handle.