Vehicle stalled while driving,engine rolls but will not start. No fire at plugs. on 2003 Nissan Xterra

Radio, lights everything else works vehicle won't start. Just filled gas tank before this occured. Possibly the timing belt?

2 answers
Do you have any lights flashing like the check engine or security light or theft light? check it with a scantool to see if you get any codes

check to see if distributor froze up or timing belt/ COMMON PROB