County Championship D1, Hove, day two (stumps): Sussex 143 & 111-3 v Notts 229
Mushtaq Ahmed and Chris Read were involved in a heated exchange in the match between Sussex and Notts.
Chris Read was unhappy with Ahmed's first-ball appeal
The pair clashed after Mushtaq trapped Read lbw, with the Notts keeper thought to be unhappy at the leg-spinner's persistent appeals to the umpire.
BBC Radio understands the players, captains and officials were due to have a meeting after the close of play.
Mushtaq ended with 6-72 as Notts were bowled out for 229, with Sussex 111-3 in their second innings, a lead of 25.
Notts coach Mick Newell insisted there was no scuffle, just verbal exchanges.
The altercation happened after Read headed for the pavilion following his dismissal.
He then left the dressing-room, walked down a flight of stairs and exchanged angry words with Mushtaq who was fielding on the boundary.
Sussex captain Chris Adams was also involved, leaving the field and entering the Notts dressing room, where he spoke to Read.
But suggestions that there may have been a physical confrontation have been played down by both sides.
England chairman of selectors David Graveney was at the ground but did not witness the incident.
Read issued an apology later in the day which said: "It was totally out of character and will not happen again."
Sussex had reduced Notts to 148-7, but Mark Ealham ensured a key first innings advantage of 86 for the visitors.
The veteran all-rounder pulled Mushtaq over mid-wicket for six on route to a 52 from 66 balls also containing six fours.