11.   After the slaying, police began receiving threatening notes and phone calls believed made by the killer.

12.   Crew members came across a threatening note in the business section and passed it to the pilots, officials said.

13.   He surrendered peacefully after students notified officials that he had passed someone a threatening note.

14.   Singapore Airlines said Monday that a bomb scare had sent a Singapore-bound flight back to Germany after a passenger found a threatening note in the bathroom.

15.   School officials said the student had given a female classmate a threatening note, which she passed to a teacher.

16.   She said the package also continued a threatening note, written in English.

17.   That was two days after a letter to Daschle was opened that contained an estimated billions of spores of anthrax and a threatening note.

18.   The letters also contained threatening notes.

19.   An American Northwest Airlines passenger jet was forced into an emergency landing in China Thursday after a threatening note was found on board, the state news agency reported.

20.   Officials said anti-terrorist police have taken over the inquiry after the discovery of a threatening note written on cloth found in a rubbish bin several hundred metres away.