1.   To combat the fraud, the department instructs visitors to its Internet site at www.usdoj.gov to be wary of unknown callers seeking information related to money.

2.   A Royal Jordanian airliner en route from Chicago to Amman made an emergency landing Tuesday in Vienna after an unknown caller reported a bomb had been placed aboard.

3.   Although that problem appeared to be mechanical, false bomb threats kept pouring in from unknown callers.

4.   In Aden, Yemeni security officials said the telephoned bomb threat from an unknown caller arrived around midnight.

5.   In Aden, Yemeni security officials said the telephoned bomb threat from an unknown caller came in around midnight.

6.   The officials said the telephone threat from an unknown caller was received around midnight.

7.   The unknown caller, whose accent was possibly Slovak, mentioned that Kovac Jr. was being sought by Interpol, they said.

8.   The visit was called off after an unknown caller told the Moscow Municipal Department that a bomb had been planted in the school.

a. + caller >>共 184
anonymous 38.39%
unidentified 4.19%
cold 2.27%
angry 2.27%
first 2.09%
male 1.75%
frequent 1.57%
female 1.40%
irate 1.40%
unknown 1.40%
unknown + n. >>共 654
number 16.20%
assailant 8.26%
reason 6.09%
group 5.17%
gunman 3.79%
destination 3.29%
quantity 3.06%
attacker 2.44%
location 2.05%
origin 1.91%
caller 0.22%
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