It seems like the reports are mixed:

ANKARA, Turkey - Hundreds of Turkish troops crossed into northern Iraq early Wednesday to chase Kurdish guerrillas who attack Turkey from bases there, Turkish security officials said. One official said the troops had returned to their bases by the end of the day, but Turkey's foreign minister denied they had ever entered Iraq.

The senior security officials, speaking on condition of anonymity because they were not authorized to speak to the media, characterized the raid as a "hot pursuit" raid that was limited in scope. They told The Associated Press it did not constitute the kind of large incursion that Turkish leaders have been discussing in recent weeks.

One official said several thousand troops went less than two miles inside Iraq and were still there in late afternoon. "It is a hot pursuit, not an incursion," one official said.

Another official said by telephone it was "not a major offensive and the number of troops is not in the tens of thousands." He also said the Turkish troops went into a remote, mountainous area.

A third official, based in the border region, said 600 commandos entered Iraq, and were backed up by several thousand troops along the border. He said the commandos raided Iraqi territory across from the Turkish border town of Cukurca before dawn after rebels opened fire from Iraqi soil on Turkish patrols.

The official said the commandos returned to their bases in Turkey later in the day. There was no immediate explanation for the conflicting accounts of the officials.

I guess we'll all just have to stay tuned