Fast food workers across the US have staged a walkout to protest against low wages and rising income inequality.

The one-day strike targeted fast-food restaurant operators, including McDonald’s and Burger King.

This is the latest in a series of strikes by US workers over the past 18 months.

Fast food workers are demanding wages of $15 an hour, significantly higher than the federally-mandated minimum wage of $7.25 per hour in the US.

The workers are also seeking the right to unionise without retaliation, according to the union leaders.

Strikes were planned in 150 cities in the US, including Boston, Chicago, New York, Philadelphia and Miami.

In response, the National Restaurant Association, which represents fast food chains such as McDonalds and Burger King, said that a dramatic rise in labour costs like the one proposed is not the comprehensive solution to income inequality, and would actually hurt business owners’ ability to create entry level jobs.

"The workers are also seeking the right to unionise without retaliation, according to the union leaders."

McDonald’s and Burger King have stated that they pay fair wages to their employees.

In a statement, McDonald’s said: "McDonald’s respects our employees’ right to voice their opinions and to protest lawfully and peacefully."

Currently, 21 states and Washington, DC have minimum wages higher than the federal minimum wage, while the state of Washington has the highest minimum wage at $9.32 an hour.

Although US President Obama has pushed for an increase of the federal minimum wage to $10.10 per hour, that initiative has been blocked by Republicans in Congress.

With the latest strike over low wages, US fast food workers have joined their counterparts in several countries, including Indonesia, France and Brazil.

According to organisers, about 230 protests were planned in 33 countries.