A file photo shows an Instagram logo.

Instagram and Twitter have blamed technical errors for deleting posts mentioning the ransack of Palestinians from East Jerusalem, but data rights groups fear "discriminatory" algorithms are at work and want greater transparency.

Palestinians living in the Sheikh Jarrah neighbourhood claimed by Jewish settlers have taken to social media to protest as they get ransacked, but some found their posts, photos or videos removed or their accounts blocked starting last week.

It came as a long-running legal case over evictions from homes in Sheikh Jarrah has fuelled tensions in Jerusalem where hundreds of Palestinians clashed with Israeli police on Monday.

By Monday, 7amleh, a nonprofit focused on social media, had received more than 200 complaints about deleted posts and suspended accounts related to Sheikh Jarrah.

"On Instagram, it was mostly content takedown, even archives from older stories were deleted. On Twitter, most cases were an account suspension," said Mona Shtaya, an advocacy adviser at 7amleh.

Instagram and Twitter said the accounts were "suspended in error by our automated systems" and the issue had been resolved and content reinstated.

Instagram said in a statement that an automated update last week caused content re-shared by multiple users to appear as missing, affecting posts on Sheikh Jarrah, Colombia, and US and Canadian indigenous communities.

"We are so sorry this happened. Especially to those in Colombia, East Jerusalem, and Indigenous communities who felt this was an intentional suppression of their voices and their stories – that was not our intent whatsoever,” Instagram said.

CALLS FOR CLARITY

But in a joint statement, 7amleh, Access Now, and other digital rights groups called on Twitter and Instagram to use "transparent and coherent moderation policies"and be more open when take-downs happen.

Marwa Fatafta, Middle East and North Africa policy adviser for Access Now, said Twitter and Instagram users saw continued restrictions on content over the weekend.

One of those affected was Hind Khoudary, a 25-year-old Palestinian journalist based in Turkey, who noticed last Thursday that some posts about Sheikh Jarrah from her Instagram archives were not loading.

"I restarted my phone and my wifi, but it was all still missing and Instagram was very slow," Khoudary said.

Some of her posts had been restored by Friday afternoon but some, dating as far back as April and even as recently as Saturday, were still missing according to screenshots from her phone that she shared with the Thomson Reuters Foundation.

Some affected users received messages about "violating community standards" from Instagram.

Data rights groups said the technical glitch had revealed the risks of using an automated algorithm to try to weed out violent or otherwise inappropriate posts.