Pakistan, Nov. 12 -- Indonesia's Vice President Gibran Rakabuming Raka has resigned, an aide said on Wednesday, a move that threatens to split a key political alliance and risks further political uncertainty in Southeast Asia's largest economy.

Gibran, the 39-year-old son of former President Joko Widodo, has come under intense scrutiny from lawmakers following Constitutional Court and Supreme Court rulings last month that his education documents did not meet election requirements.

The aide, Budi Arie Setiadi, told Reuters that Gibran had tendered his resignation to President Prabowo Subianto earlier on Wednesday.

Separately, two sources at the parliamentary upper house, which will oversee the process of approving his resignation and se...