EXCLUSIVE

Foster the People's hit song "Pumped Up Kicks" -- whose lyrics depict a violent school shooting -- won't be getting ANY airplay whatsoever in the wake of the Newtown massacre ... at least on L.A.'s #1 hit music station.

Sources at KIIS-FM tell TMZ, the station has completely pulled "Pumped Up Kicks" from its rotation after the shooting at a Connecticut elementary school last week.

Foster the People frontman Mark Foster has said the song was written about a psychotic, homicidal youth to help bring awareness to gun violence in schools -- and was partly inspired by the Columbine tragedy.

Here's the song's chorus -- All the other kids with the pumped up kicks, / You better run, better run, outrun my gun. / All the other kids with the pumped up kicks, / You better run, better run, faster than my bullet.

As we reported, Ke$ha's song "Die Young" has also plummeted from the charts due to its inopportune lyrics.

Our sources say KIIS-FM hasn't yet made a decision about yanking "Die Young" entirely -- but "Pumped Up Kicks" is definitely off the air for the foreseeable future.