(CNN) -- At least one person was killed when a National Guard helicopter crashed in waters off San Juan, Puerto Rico, a Federal Aviation Administration spokeswoman said Tuesday, citing preliminary information.

"The preliminary information we have ... is that the wreckage of (the) Army National Guard aircraft was found in the water near San Juan," spokeswoman Diane Spitaliere said in an e-mail.

The aircraft was destroyed, she said.

The crash occurred late Monday, according to Lt. Cmdr. Matthew Moorlag of the U.S. Coast Guard in Miami, Florida.

The Coast Guard received the call to help late Monday night with search and rescue efforts, said Ricardo Castrodad, spokesman for the Coast Guard in San Juan. He said three crew members and three passengers -- one guard and two civilians from Puerto Rico -- were on board.

The UH 72 Lakota helicopter departed Monday night from San Juan, he said. It was one nautical mile northeast from the Puerto Rican coast.

Castrodad did not provide information on casualties but said the search for survivors was ongoing.

CNN's Mike Ahlers and Maria P. White contributed to this report.

1. What sort of crash happened?
2. Who owned it?
3. Where did it happen?
4. Was anyone hurt?
5. How badly?
6. Did the vehicle get totaled?
7. When did this happen?
8. What date was that?
9. Was there a spokesperson for the accident?
10. What is their name?
11. How did she communicate?
12. Did another agency assist?
13. Who?
14. Did they have a spokesperson?
15. How many from that agency helped?
16. Is the effort to recover victims still going on?
17. Is all this info finalized?
18. What was the model of the vehicle that was totaled?
19. How far away from land did they find it?
20. Who reported on this?

Numbered answers:
1. helicopter
2. the National Guard
3. San Juan, Puerto Rico
4. yes
5. they were killed
6. yes
7. Monday
8. unknown
9. yes
10. Diane Spitaliere
11. by e-mail
12. yes
13. The Coast Guard
14. Ricardo Castrodad
15. unknown
16. yes
17. unknown
18. The UH 72 Lakota helicopter
19. one nautical mile
20. CNN