Scotland's top law officer will be asked to assess the implementation of the controversial anti-sectarianism law amid concerns about "overzealous" police enforcement and court room confusion.

In recent months, Glasgow police officers have been accused of kettling Celtic fans marching against The Offensive Behaviour at Football and Threatening Communications (Scotland) Act 2012.

A Dundee sheriff also reportedly described the Act as "horribly drafted" and was said to have called for the abolition of denominational schools.

Holyrood's Justice Committee will now write to Lord Advocate Frank Mulholland for his view on how the Act has been implemented in court. Police Scotland's chief constable and the head of civilian oversight body the Scottish Police Authority will be asked about officers' behaviour at the Celtic march on Glasgow's Gallowgate on March 13.

The committee will also write to Justice Secretary Kenny MacAskill asking if an urgent review of the Act is now required.

Committee members were divided on the need for a review, with Labour, LibDem, Conservative and independent MSPs suggesting one may be necessary, against SNP MSPs.

The Act contains provisions for a review by August 2015, but Labour MSP Graeme Pearson said this seemed a long time away.

Speaking at the committee, he said: "If we fail to scrutinise the way our legislation is being used and do it in a timely manner that is not good for those being charged in relation to the Act. As of April 2014, 34 people have been dealt with in relation to the Act, 83% of those prosecuted."

Conservative MSP John Lamont said: "There is an onus on us as a committee to look at this Act - and consider whether the time-scale of review should be accelerated."

LibDem MSP Alison McInnes said: "There are concerns about heavy-handed and biased enforcement, and the spotlight must be shone on those."

Independent MSP John Finnie, a former SNP member, said: "Celtic supporters feel there has been an overzealous application."

SNP MSP Sandra White insisted the Gallowgate disturbance "had absolutely nothing to do with this Act". SNP MSP Colin Keir also said the march should not be a consideration in calling for a review.