More likely Brazil - R Clube do Para or R Acreana. Kenya hasn't been reported on the NASWA list in a long time, and I think they left SW due to transmitter failure. I think TWR is looking to build a relay down there, though.
You might have heard an advertisement using those 3 letters - they're not even their callsign. Sometimes LA stations will ID right before a news broadcast (usually at the top of the hour) or at the 1/2 hour, during a programming shift. I've heard one or two Brazilians do it on the 15 min mark, so you really need to listen carefully. 73 Mike