What happened
On May 19, 2012, at approximately 0819 local time, a Boeing 737-500 operated by Air Baltic was climbing from Riga International Airport. The aircraft, registration YL-BBN, had been cleared by Air Traffic Control to climb to FL230.
Simultaneously, an Airbus 320 operated by Aeroflot was performing a go-around following an unstabilized approach. During these maneuvers, the minimum separation between the two aircraft decreased to 2.2 NM.