LAHORE, Oct. 11 -- The Tehreek-i-Labbaik Pakistan (TLP) march toward Islamabad descended into chaos on Friday, as violent clashes between supporters and police paralysed parts of Lahore and forced authorities to dig trenches and seal major routes in Gujrat district to contain the procession.

The march, led by TLP chief Saad Rizvi, was launched after Friday prayers as part of the group's so-called "Gaza March." Despite heavy police deployment, barricades, and the use of tear gas, thousands of supporters pushed through Multan Road, chanting religious slogans and defying containment efforts.

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Police attempted to hold the group near the party's headquarters by erecting...