Juan Arturo Montoya, federal prisoner # 51939-019, appeals the district court’s dismissal of his Bivens v. Six Unknown Named Agents of Fed. Bureau of Narcotics, 403 U.S. 388, 91 S.Ct. 1999, 29 L.Ed.2d 619 (1971) action. The district court dismissed the complaint as to defendants Williamson, Tapia, and Ramey on the basis that there is no respondeat superior doctrine in a Bivens action. Montoya has not shown that the district court abused its discretion in dismissing his complaint as to those defendants as frivolous. See Norton v. Dimazana, 122 F.3d 286, 291 (5th Cir. 1997). Montoya has not briefed the issue whether the district court erred in dismissing the complaint as to the remaining defendants for want of prosecution and it is deemed abandoned. See Yohey v. Collins, 985 F.2d 222, 224-25 (5th Cir. 1993).

Montoya’s appeal is without arguable merit and is thus frivolous. See Howard v. *102 King, 707 F.2d 215, 220 (5th Cir. 1983). Accordingly, the appeal is DISMISSED. 5th Cíe. R. 42.2. The dismissal of this appeal counts as a “strike” for purposes of 28 U.S.C. § 1915(g). See Adepegba v. Hammons, 103 F.3d 383, 387 (5th Cir. 1996). We caution Montoya that once he accumulates three strikes, he may not proceed in forma pauperis in any civil action or appeal filed while he is incarcerated or detained in any facility unless he is under imminent danger of serious physical injury. See 28 U.S.C. § 1915(g).

APPEAL DISMISSED; SANCTION WARNING ISSUED.