The Scottish Premier League will write to Motherwell over a missile incident involving Hibernian midfielder Merouane Zemmama.
Zemmama claimed he was nearly hit with a "lighter or whistle'' thrown from the East Stand at Fir Park during Hibernian's 3-1 victory on Saturday.
Referee Steve Conroy picked up the object and it is understood the incident has been included in SPL match delegate Gerry Collins' report. That will prompt the SPL to write to both clubs for their observations.
The SPL would not discuss the specific incident but confirmed that clubs could avoid sanctions if they had done everything possible to prevent crowd trouble and tackled flashpoints in the right manner.
Hearts escaped punishment after Hibernian striker Derek Riordan was confronted by fans on the pitch and Ian Murray was hit by a coin during their side's 1-0 victory at Tynecastle in May.
An SPL spokesman said: "If there are any crowd incidents reported to us, the first step is to write to both clubs involved and seek any information that may be relevant.
"What we're looking for is to make sure the clubs took the right action with regards to ticketing, crowd operation and stewarding, and reacted to the situation in the right manner. Clubs can't control every single supporter but we look to see whether the club reacted correctly to any situation.''
Police and stewards questioned fans in that section of the stand following the incident, which came after Zemmama angered the home support by celebrating his goal in front of them.
A Motherwell spokesman said: "We have launched an internal probe and appeal to supporters with any information over the incident to contact us. Anyone found guilty of throwing a missile would face appropriate action.
"The club qualified for Europe this season through the Fair Play League, part of which was judged on our supporters' behaviour. So, although it is disappointing, we believe this was an isolated incident.''