Gaelic Games match attendees have been warned against the use of flares and smoke bombs ahead of this weekend's matches.
The Munster Council has issued a notice appealing to supporters to abandon pyrotechnics on health and safety grounds.
A statement highlighted the clash of Limerick and Cork, which will go a long way to deciding the outcome of the round-robin competition, as one game in which fans may be tempted to use the pyrotechnics.
A statement read: "In advance of Munster Championship games, and particularly Sunday's Munster Senior Hurling fixture between Limerick and Cork at the TUS Gaelic Grounds, Munster GAA and An Garda Síochána wishes to remind supporters of the dangers of igniting flares and smoke bombs within grounds.
"These items are illegal and present a serious safety risk to supporters. Any person caught in possession will be refused admission to the ground by stewards and security staff. It is a criminal offence to ignite a flare in a crowded area and anyone who does so will be subject to ejection from the venue and will face criminal prosecution by An Garda Síochána.
"With an expected attendance of 40,000+ supporters in the Gaelic Grounds on Sunday Munster GAA want to ensure the safest possible atmosphere so that all can enjoy the games."
Munster GAA operations manager John Brennan said flares have shown to be particularly dangerous: "These devices are extremely dangerous, particularly when used in a confined space, such as a terrace with thousands of fellow supporters present.
"Flares can burn at a very high temperature and present a serious safety risk to those holding them and to those in the general vicinity, especially young children.
"Smoke bombs also burn at high temperatures and can be dangerous for those with asthma or breathing difficulties. Munster GAA ask that the small number of supporters who do bring these items to our games refrain from doing so."
The Munster GAA statement follows a similar appeal in soccer where the use of pyrotechnics has become a regular feature. Dublin Fire Brigade assisted the League of Ireland in stressing the dangers of their use.
Listen to the RTÉ GAA Podcast on the RTÉ Radio Player, Apple Podcasts, Spotify or wherever you get your podcasts
We need your consent to load this rte-player contentWe use rte-player to manage extra content that can set cookies on your device and collect data about your activity. Please review their details and accept them to load the content.Manage Preferences
Watch a hurling double-header, Dublin v Galway and Limerick v Cork, from 1.30pm on Sunday on RTÉ2 and RTÉ Player, follow a live blog on the
RTÉ News app or RTÉ.ie/Sport or listen to live radio updates on Sunday Sport on RTÉ Radio 1