The cause of the derailments has not been determined, but the Federal Railroad Administration is investigating.

The newspaper reported that the Federal Railroad Administration will investigate last month's violations for a possible pattern.

The Federal Aviation Administration is investigating the incident, which occurred about 11:45 A.M.

He said the Port Authority police and the Federal Drug Enforcement Administration are investigating.

Both the Federal Aviation Administration and the National Transportation Safety Board are investigating.

Federal Aviation Administration and airline officials are investigating.

The Federal Aviation Administration is investigating four incidents over a 10-hour period in which commercial jets came within 500 feet of colliding with smaller planes, officials said today.

The Federal Aviation Administration, which certifies flight attendants, is also investigating the incident.

The Federal Aviation Administration said the jump was unauthorized, and investigated the pilot involved in the incident.

The Federal Aviation Administration and the Riverside County coroner are investigating.