21.   Authorities could not track whether there has been a recent increase in unplanned and unwanted pregnancies, which would create more demand for abortions.

22.   Authorities tracked down the engineer after the article posted in May spread to other Internet sites, the government-run China Business Times reported.

23.   Authorities are tracking down their assets, some of which are said to have been stashed overseas.

24.   Authorities tracked her down by tracing a phone call from her mother in Lecce, in southern Italy, the Milan daily Il Giornale reported.

25.   Authorities tracked down the two by tracing the calls.

26.   Authorities tracked him to North Carolina, where he was arrested.

27.   Authorities tracked him to North Carolina.

28.   Authorities tracked the man through security checks, including metal detectors, and stopped him at the gate.

29.   It said authorities tracked him down with the aid of his phone book, which he mistakenly left behind in New Jersey.

30.   Most of the detainees these days come from Pakistan, where Pakistani authorities are tracking down Taliban and al-Qaida figures who fled across the border.