At least 100 Indian fishermen were arrested on Sunday for illegally fishing in Pakistani maritime boundary.
At least 19 boats were also seized during the raid by the Maritime Security Agency (MSA).
"The 100 men would be taken to the court on Monday," senior police official Adeel Chandio said after the fishermen were handed over to the police by MSA officials.
Every year dozens of Indian and Pakistani fishermen are picked up in the Arabian Sea after straying across maritime borders.
They often languish in prison even after serving their sentences, as poor diplomatic relations between the two neighbouring countries hamper their swift release.
Pakistan released 219 Indian fishermen as a "goodwill" gesture in January.
On March 4, 18 fishermen released from India had reached Karachi.
