LAHORE, Oct. 10 -- The city remained tense on Thursday following overnight clashes between police and Tehreek-i-Labbaik Pakistan (TLP) workers that left several people injured, including a dozen policemen.

The confrontation erupted after TLP's call for a march to Islamabad, where the group planned to stage a protest outside the US embassy in solidarity with Palestinians. In response, authorities launched a crackdown, sealing the TLP headquarters on Multan Road with shipping containers and blocking major entry and exit routes to prevent the rally.

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In Islamabad, containers were also placed at entry points, while police detained over 100 TLP supporters in advance of the p...