1993 Tehran mid-air collision
On 8 February 1993, Iran Airtour Flight 962, a Tupolev Tu-154, collided in mid-air with an Islamic Republic of Iran Air Force (IRIAF) Sukhoi Su-24 attack aircraft near the Iranian capital of Tehran, killing all 133 people aboard both aircraft. It was the deadliest aviation accident in 1993.
Source: Wikipedia — 1993 Tehran mid-air collision (CC BY-SA 4.0)