Celtic manager Neil Lennon was attacked at Tynecastle last night during the Scottish Premier League game against Hearts after Gary Hooper had put the visitors two goals ahead.
Before the game could restart a fan clambered from the Hearts section of the main stand and made a beeline for the Celtic boss who was on the touchline, leading to an intervention by police and stewards after the fracas ended. The supporter was subsequently taken away by police.
Trouble ensued in the Celtic section of the stadium with fans appearing to fight with police and stewards.
Former Northern Ireland captain Lennon has been in the headlines regularly this season for incidents on and off the field.
He was involved in a controversy in November over a rejected penalty claim -- against Hearts at Tynecastle -- for which he later received a touchline ban for his comments.
In January a package addressed to him containing bullets was intercepted at a sorting office in Co Antrim.
In March, the club confirmed Lennon was under 24-hour security surveillance after a suspicious package was intercepted at a Royal Mail sorting office in Saltcoats, Ayrshire.
On April 19 it emerged that Royal Mail intercepted a total of two "viable" parcel bombs addressed to the Celtic boss.