Pakistan's military claims it "detected and blocked" an Indian military submarine from entering Pakistani territorial waters earlier this week.
The Pakistani military said in a statement on Tuesday that the attempted incursion by the Indian submarine had occurred on Saturday night. It said the submarine had been "prematurely detected and tracked by [the Pakistani navy's] long-range maritime patrol aircraft."
"During the prevailing security milieu, a strict monitoring watch has been kept by Pakistan Navy to safeguard maritime frontiers of Pakistan," the statement read.
A video recorded by the Pakistani military and circulating on media purportedly shows infrared footage of a submarine mast taken on October 16 between 11:18 pm and 11:36 pm local time. The geographic location tag for the "target" in the footage places the vessel approximately 283 km south of the southern Pakistani port city of Karachi.
It is the third time Pakistan's military claims it has detected an Indian submarine since 2016. The two previous claims occurred in November 2016 and March 2019.
There was no immediate comment from India.
India and Pakistan have fought four wars since their partition in 1947. Their relations have been particularly tense since a 2019 military standoff that centered on the disputed Himalayan region of Kashmir.
The government of Indian Prime Minister Narendra Modi later that year revoked the self-autonomy of the Indian-controlled Kashmir, in a move described by Pakistan as illegal. Since then, India has imposed more internet shutdowns and other restrictions in the Muslim-majority region.
The two countries frequently accuse each other of sponsoring armed groups or planning attacks against each other.