Indonesia has denied entry and will deport an Australian graduate student who was travelling via Bali to Indonesia’s easternmost province of Papua on holiday.

Belinda Lopez, a PhD candidate in Indonesian studies at Macquarie University in Australia, wrote on social media that she had been detained at Bali’s Denpasar airport since midnight on Saturday and was told she was on a government blacklist.

This is not a joke: I’m blacklisted by the Indonesian government.

Saya termasuk dalam daftar tangkal Indonesia (terjemahan dibawah). pic.twitter.com/diMWQhPC6h — Belinda Lopez (@belle_lopez) August 3, 2018

Papua has suffered a simmering separatist conflict since it was incorporated into Indonesia after a widely criticised UN-backed referendum in 1969 and remains one of its poorest regions. Access to international media remains restricted.

Lopez, who was formerly a reporter in Jakarta, said on Facebook that she was on her honeymoon and had planned to visit the Baliem tourism festival in Papua.

But on arriving at Bali airport, she was denied entry by immigration and asked if she was a journalist and whether “she had done something wrong to Indonesia”.

Lopez wrote she had previously been deported from Papua in 2016, after being suspected of being a reporter.

Immigration office spokesman Agung Sampurno denied Lopez was being deported on suspicions she was heading to Papua as a journalist.

“Belinda was barred from entering Indonesia on an immigration issue,” he said.

However, he confirmed that Lopez was on an immigration blacklist.

Sampurno declined to provide an explanation for the immigration issue, noting it was Indonesia’s sovereign right to deny entry to travellers.

Human Rights Watch researcher Andreas Harsono said Lopez’s “case shows once again that the Indonesian authorities are still restricting foreign journalists, or anyone suspected [of doing] journalism, to enter Papua”.

President Joko Widodo, after coming to power in 2014, pledged to ease media restrictions for Papua, but activists say journalists continue to be blocked when trying to report from there.