Police in Glasgow are warning of "pipe bomb" threats amid raised tensions surrounding Orange Walks in the city.
"Hardened attitudes" between both sides of the debate have sparked concerns for senior officers.
And those fears have now been raised amid plans to hold another Orange Walk past a Catholic church where a priest was attacked.
Canon Thomas White was spat on last July as an Orange walk passed St Alphonsus Church on London Road.
Bradley Wallace, 24, from Uddingston, Lanarkshire, was later jailed for 10 months after he pled guilty to the offence.
Tensions have been raised ever since, with numerous planned walks past the place of worship coming under fire from counter-protestors.
Councillors are now debating whether to allow the County Grand Orange Lodge of Glasgow to parade on the same route on June 8 - with around 1000 people due to take part.
Superintendent John McBride warned that in excess of 200 officers would be needed to police the parade, in comparison to just 11 during a similar march prior to the attack on Canon White.
The superintendent added: "In addition, social media posts regarding use of pipe bombs and burning vehicles has also been noted and whilst I would not advocate that this is a serious threat, it does go some way to evidencing the hardened attitudes of some."
He warned that the avoidance of disorder during a recent parade past the church on May 18 - which was met with counter protests - was down to the "heavy police presence".
The top cop claimed that "in excess of 200 officers, many in specialist roles and drawn from across Scotland" would be needed for the march.
In his letter to councillors, Superintendent McBride added: "It seems clear enough to us that this is likely to have a significant and disruptive impact on the life of the local community.
"It would also place an excessive burden on Police Scotland as far as deploying resources necessary to mitigate the risks arising is concerned."
However, he argued that just a small deviation of the route away from the church would mitigate such a need.
The officer also noted that during the previous march, shouts of "F****n b*****ds" and "paedos" were heard within those supporting the parades - targeting counter protesters who lined the streets outside St Alphonsus.
Last week we told you how loyalist groups failed to overturn a council ban preventing them marching past the Catholic church where the priest was spat on last year.
Lawyer Neil MacDougall, acting for four Orange groups, claimed that the council's decision was a breach of their human rights under European law.
Sheriff Stuart Reid, though, found in favour of the council in the hearing which lasted more than two hours.
