Warrant issued for second witness

WASHINGTON -- A second arrest warrant for a material witness in the hijackings investigation was issued by federal prosecutors in New York, the Justice Department said Saturday.\nThe person had not yet been arrested at the time the warrant was issued.\nInvestigators expected to issue additional warrants, perhaps as soon as Saturday evening, as the investigation into Tuesday's attacks shifts into higher gear.\n"We are at a point where there will be additional and more frequent warrants," said Justice Department spokeswoman Mindy Tucker.\nMeanwhile, 25 people arrested for immigration violations since Tuesday's hijackings have been questioned by the FBI in the investigation, the Justice Department said.\nNone has been formally charged, either on immigration counts or with crimes related to the four hijackings, Tucker said. Some but not all of the detainees who have been interviewed are cooperating with the FBI. All are in the Immigration and Naturalization Service's custody.\nTucker said that the FBI may not be finished questioning the 25 detainees. None have been released.\nShe declined to say whether any of the 25 are suspected of being accomplices to the plot or whether they have significant information about the plot. "It's not clear in all cases how important their information is," said Tucker.\nAmong them are two men detained at an Amtrak station in Fort Worth, Texas. They were interviewed by FBI agents, taken into custody and flown to New York.\nThe two boarded a flight Tuesday morning in Newark, N.J., as the four hijackings were under way, said a law enforcement source, speaking on condition of anonymity. The plane was grounded in St. Louis as the FAA halted all air traffic; the men then boarded an Amtrak train bound for Texas.\nThey were taken off during a routine drug search Wednesday night. Although no drugs were found, the men had box-cutting knives, authorities said, and also carried about $5,000 in cash, according to a federal official who spoke on condition of anonymity. \nThe hijackers had used knives and box cutters to take control of the planes.\nThe official would not comment on whether the two from Texas were cooperating with authorities.\nSome of the 25 were detained because they were discovered to have immigration problems when FBI agents questioned them about the attacks. Others were arrested as part of unrelated investigations and came to the attention of authorities investigating the hijackings.\nThe immigration problems could range from overstayed or expired visas to being employed without a work visa. The detainees can be held for an indefinite amount of time, and there is no deadline for charging or releasing them.\nThe INS can detain those arrested for immigration problems for whatever time is deemed "reasonable" to deal with their case, department officials said. Prosecutors sometimes hold foreign nationals on immigration violations as a way to buy time to investigate other charges.\nOfficials declined to say where the 25 were arrested or where they are being detained.\nAlso Saturday, Attorney General John Ashcroft said the investigation into the attacks was moving forward.\nThe FBI is looking for more than 100 people who may have information about the attacks, two planes flown into the twin towers of New York's World Trade Center, one into the Pentagon and a fourth into the Pennsylvania countryside.\n"We are making the kinds of contacts and developing the information that allows us to describe this as proceeding with reasonable success," said Ashcroft, who met with President Bush and administration officials at Camp David. "We are beginning to understand the ways in which this terrible crime was committed."\nInvestigators have sent the flight data recorder and voice recorder from the plane that crashed in Pennsylvania to the manufacturer for analysis. The cockpit voice recorder of the jet that hit the Pentagon was badly damaged and may not provide much information, officials said.\nIn Germany, police found "airplane-related documents" in a suitcase they believe belonged to one of the hijackers, federal investigators said Saturday.