The Southern Tagalog 10 was a group of activists abducted and "disappeared" in 1977 during martial law in the Philippines under Proclamation No. 1081 issued by President of Philippines Ferdinand E. Marcos. Of the 10 university students and professors who were abducted, only three, Virgilio Silva, Salvador Panganiban, and Modesto Sison, "surfaced" later after being killed by suspected agents of the state. Two of those who surfaced were apparently summarily executed. The rest were never found.