  We study the null geodesics in a static circularly symmetric (SCS) black hole
spacetime which is a solution in the $(2+1)$-dimensional massive gravity
proposed by Bergshoeff, Hohm and Townsend (BHT massive gravity). We obtain
analytic solutions for the null geodesic equation in the SCS black hole
background and find the explicit form of deflection angles. We see that for
various values of the impact parameter, the deflection angle can be positive,
negative or even zero in this black hole spacetime. The negative deflection
angle indicates the repulsive behavior of the gravity which comes from the
gravitational hair parameter that is the most characteristic quantity of the
BHT massive gravity.
