Paris trash collectors are this week to suspend a three-week strike that has seen thousands of tonnes of garbage accumulate in the French capital, a union said on Tuesday.

The walkout would be suspended from Wednesday to allow coordination with workers "so we can go on strike again even more strongly" as fewer workers were now striking, the CGT union said.

As of Tuesday, the 23rd day of the strike against President Emmanuel Macron's pension reforms, some 7,000 tonnes of uncollected rubbish were still clogging Paris streets compared with 10,000 last Friday, according to the city hall.