A human rights NGO has accused Israel of forcing Palestinians to withstand "cruel and inhuman" conditions at its borders.
The Israeli Information Centre for Human Rights in the Occupied Territories, also known as B'Tselem, said even those with legitimate work permits were being made to wait for hours in extremely hot weather.
B'Tselem posted an image on Facebook and said in a statement: "The Palestinians photographed waiting in line have permits that allow them to work in Israel. Such permits are issued only after meticulous security screening."
"Making people wait in line for hours, in unbearable conditions, highlights the cruel and inhuman aspects of military control over a civilian population.
"The occupation has now entered its 50th year. This glaring injustice has gone on for nearly a half century, aided by ignorance and indifference."
The image purports to show a checkpoint in the West Bank, between Bethlehem and Jerusalem, in the early hours of the morning. It appears to show a crowd of people tightly packed along a fenced pathway, with some finding respite high along the walls.
Text accompanying the photo reads: "This is what the daily grind of the #occupation looks like: It doesn't necessarily mean the use of weapons or brutality. Just callous and cruel humiliation. For no reason, just because it can be done."
A spokesperson for the Embassy of Israel in London told the Independent newspaper: "People waiting at checkpoints and security screenings are not an Israeli phenomenon."