According to reports, about 5,000 people attended a rally in the town of Kotli, a town in Pakistan-occupied Kashmir.
Among those who addressed the gathering were senior LeT commander Abdul Wahid Kashmiri and Hizb-ul-Mujahideen chief Syed Salahuddin.
Kashmiri said, "LeT would continue to support the Kashmiri people until they achieve freedom from India."
He further said, "It is the religious obligation of mujahideen to fight invaders and oppressors across the world."
The rally was organised to mark Pakistan Day, the anniversary of the adoption in 1940 of the Pakistan Resolution, which called for the creation of a separate country for the Muslims of the subcontinent.