Trump's expanded travel ban: Which countries are affected?

US President Donald Trump has expanded his controversial travel ban, often referred to by critics as a Muslim ban, to target citizens from six additional countries.

The move on Friday was slammed by immigrant advocates and critics who say the policy discriminates against Muslims and others.

The announcement comes three years after Trump sparked outrage by signing an executive order suspending immigration from several Muslim-majority countries. That travel ban, which caused chaos and protests at airports, was challenged in the courts and eventually amended to target five Muslim-majority countries - Yemen, Syria, Iran, Libya and Somalia - as well put restrictions on nationals from Venezuela and North Korea.