San Antonio Fire & Police Pension Fund committed $20 million to Merit Energy Partners L.
The $3.7 billion pension fund's board approved the commitment to the oil and gas fund at its May 30 meeting, recently released meeting minutes showed.
The pension fund previously committed $10 million to Merit Energy Partners I in 2014.
The pension fund has a target allocation of 5% to real assets.
Cary Hally, chief investment officer, could not be immediately reached for further information.