from non-Warsaw Pact countries
Of the foreign press corps in Warsaw at that time I know of only one foreign journalist ordered to leave. That was Ruth Gruber of UPI. She was the mistress of one of the Gdańsk Solidarność activists and received a notice to collect something at the post office. It was a packet of illegal (according to the Jaruzel gang) underground leaflets and the momnetn she collected it several plaincothesmen whisked her away. It was an obivious set-up. I don't think her reports from martial-law Poland were any different from the others, but the regime needed a scapegoat so the remaining correspodnents would watch their step. Why she was chosen I have no idea.After she was thrown out of Poland I later heard she was working for the Jewish Telegraphic Agency.
I can't speak for the news photographers, TV crews and technicians working for Western news organisations, but I know of no other foreign correspodnent from AP, UPI, Reuters, EFE, ANSA, DPA or AFP that was ordered out. Naturally TASS, Novosti, ČSA and other Soviet-bloc reps had no such problems.