IS IT A PHASE FOR YOUR 2 YEAR OLD TO HIT AND PUSH HIS FRIENDS AT SCHOOL?

SO MY 2 YEAR OLD LITTLE BOY HAS APPARENTLY BEEN HITTING AND PUSHING HIS FRIENDS FOR 2 DAYS IN A ROW NOW. THE FIRST DAY I HAD A 2 YEAR OLD TALK WITH HIM AND TOLD HIM THAT WAS NOT NICE AND THAT HE DOES NOT UNDER ANY CIRCUMSTANCE HIT OR PUSH ANYBODY. ITS NOT NICE AND HE WOULDNT WANT ANYBODY DOING THAT TO HIM. HE IS A SMART BOY. SO I MADE IT CLEAR TO HIM BECAUSE HE WAS NOT GOOD HE DOES NOT GET REWARDED WITH JUICE OR CARTOONS. ONLY MILK OR WATER AND WE WILL WORK ON FLASH CARDS AND GO TO BED. SO WE DID THAT THE FIRST NIGHT. YESTERDAY HE GOES TO SCHOOL AND AGAIN THE REPORT FROM THE TEACHER SAYS "WE NEED TO WORK ON SOMETHING WITH HIM TO HELP HIM TO STOP HURTING HIS FRIENDS FOR NO REASON. KEEPS HITTING AND PUSHING HIS FRIENDS FOR NO REASON" NOW AT THIS POINT I WAS VERY UPSET WITH DYLAN. I DONT GET IT. HE NEVER SEES ANYONE PUSH OR HIT IN ANY CIRCUMSTANCE WITH US AS A FAMILY. MY HUSBAND AND I DONT EVEN PLAY FIGHT IN FRONT OF HIM OR ANYTHING. HE KNOWS NOT TO HIT AND PUSH BUT ITS LIKE HE HAS JUST BEEN DOING IT FOR SOME REASON THE PAST 2 DAYS. IM NOT SURE WHY. SO I SAT HIM DOWN AGAIN AND HAD A TALK WITH HIM AND TOOK THE JUICE AND CARTOONS AWAY AGAIN FOR THE NIGHT AND WENT ABOUT IT DIFFERENTLY THIS TIME. WHEN WE DID SOMETHING THAT HE DIDNT WANT US TO DO I SAID "OK I WILL STOP BECAUSE YOU ASKED ME TO JUST LIKE WHEN MOMMY ASKS YOU NOT TO DO SOMETHIN I WANT YOU TO NOT DO IT SO I WILL STOP IM SORRY" AND DID THAT METHOD ALL NIGHT. NOT SURE IF IT WILL HELP. WE HAVE SCHOOL TODAY AND I DONT WANT HIM HITTING AND PUSHING HIS FRIENDS AT ALL FOR NO REASON. ITS NOT GOOD. BUT I DONT KNOW HOW TO GET IT ACROSS TO HIM TO STOP AND NOT TO DO THAT.

DID YOUR LITTLE ONES EVER GO THROUGH THIS AT ALMOST 3?