Australia on Wednesday cut its annual intake of immigrants by nearly 15 percent, and barred new arrivals from living in its largest cities for three years, in a bid to ease urban congestion.

Prime Minister Scott Morrison, trailing badly in the polls ahead of a federal election in May, hopes to tap into rising voter frustration over house prices and congestion, which some see as a consequence of population growth.

“This is a practical problem Australians wanted addressed,” Morrison told reporters in Canberra, the capital, after announcing the annual immigration intake would be cut to 160,000 people, from 190,000 previously.

The immigration policy change comes at a time of national reflection over Australia’s attitude towards migrants after the shooting of at least 50 people at two mosques in New Zealand’s city of Christchurch.

Australian Brenton Tarrant, 28, a suspected white supremacist, was charged with murder on Saturday after he opened fire at the two mosques during Friday prayers.

“My great frustration is that, in addressing these issues of population and immigration programs, these debates often get hijacked by those of competing views who seek to exploit them for other causes,” Morrison added.

“I reject all of that absolutely.”

A ReachTel poll published in September showed that 63 percent of Sydney residents supported curbs on the number of migrants moving to Australia’s biggest city.

Morrison said the cap would include places for up to 23,000 people who could migrate to Australia under a new skilled visa.

Such arrivals could gain permanent residency after living outside of Australia’s largest cities for three years, he added.

- Reuters