The Mayor of San Juan, Puerto Rico’s capital, has begged for help after Hurricane Maria devastated the island, saying “we are dying.” For his part, President Donald Trump has attacked the mayor on Twitter.

“We are dying here,” Carmen Yulin Cruz said Friday, “And I cannot fathom the thought that the greatest nation in the world cannot figure out logistics for a small island of 100 miles by 35 miles long.”

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"I will do what I never thought I was going to do,” Cruz continued. “I am begging, begging anyone who can hear us to save us from dying. If anybody out there is listening to us, we are dying, and you are killing us with the inefficiency, and the bureaucracy."

“This is the United States of America. If somebody can put a man on the moon, they surely can walk around an island of 100 and 35 [miles] and figure out with the appropriate technology how to get it,” she said.

“So, I am asking the president of the United States to make sure someone is in charge that is up to the task of saving lives.”

Puerto Rico has been struggling to recover from Maria, amid complaints that aid has been too slow to reach the US territory. The island had also been battered by Hurricane Irma before Maria struck.

The island, home to 3.4 million Americans, has been left without power and is suffering from a shortage of food, water, fuel and other supplies. The Trump administration has drawn criticism for failing to do enough, and Trump has been accused of being slow to acknowledge the disaster.

Trump, however, has made self-congratulatory comments about the “incredible” job federal officials are doing in Puerto Rico.

Puerto Rico is devastated. Phone system, electric grid many roads, gone. FEMA and First Responders are amazing. Governor said "great job!" — Donald J. Trump (@realDonaldTrump) September 29, 2017

On Friday, Trump commended the Federal Emergency Management Agency (FEMA) and first responders for their work with Puerto Rico.

“Puerto Rico Governor Ricardo Rossello just stated: ‘The Administration and the President, every time we've spoken, they've delivered’,” Trump tweeted. “The fact is that Puerto Rico has been destroyed by two hurricanes. Big decisions will have to be made as to the cost of its rebuilding!”

Also on Friday, Trump commented on how Puerto Rico is on “a whole different level” than the damage done in Florida and Texas. He voiced concerns about the cost of replacing the island’s power grid, saying there would have to be talks about how to cover the expenses, something he did not say about Texas and Florida's recovery.

FLORIDA-Just like TX, WE are w/you today, we are w/you tomorrow, & we will be w/you EVERY SINGLE DAY AFTER, to RESTORE, RECOVER, & REBUILD! pic.twitter.com/phRMudujxJ — Donald J. Trump (@realDonaldTrump) September 15, 2017 TEXAS: We are with you today, we are with you tomorrow, and we will be with you EVERY SINGLE DAY AFTER, to restore, recover, and REBUILD! pic.twitter.com/p1Fh8jmmFA — Donald J. Trump (@realDonaldTrump) September 2, 2017

However, by Saturday, Trump’s tweets turned to the Mayor of San Juan, claiming she had been told “by the Democrats that you must be nasty to Trump.”

The Mayor of San Juan, who was very complimentary only a few days ago, has now been told by the Democrats that you must be nasty to Trump. — Donald J. Trump (@realDonaldTrump) September 30, 2017 ...Such poor leadership ability by the Mayor of San Juan, and others in Puerto Rico, who are not able to get their workers to help. They.... — Donald J. Trump (@realDonaldTrump) September 30, 2017 ...want everything to be done for them when it should be a community effort. 10,000 Federal workers now on Island doing a fantastic job. — Donald J. Trump (@realDonaldTrump) September 30, 2017

“Such poor leadership ability by the Mayor of San Juan, and others in Puerto Rico, who are not able to get their workers to help,” the president tweeted. “They want everything to be done for them when it should be a community effort. 10,000 Federal workers now on Island doing a fantastic job.”

Trump then turned his sights on the “fake news” media, accusing them of “going out of their way to disparage our great First Responders as a way to “get Trump.”"

Fake News CNN and NBC are going out of their way to disparage our great First Responders as a way to "get Trump." Not fair to FR or effort! — Donald J. Trump (@realDonaldTrump) September 30, 2017 I will be going to Puerto Rico on Tuesday with Melania. Will hopefully be able to stop at the U.S. Virgin Islands (people working hard). — Donald J. Trump (@realDonaldTrump) September 30, 2017

“The Fake News Networks are working overtime in Puerto Rico doing their best to take the spirit away from our soldiers and first R's. Shame!”

The Fake News Networks are working overtime in Puerto Rico doing their best to take the spirit away from our soldiers and first R's. Shame! — Donald J. Trump (@realDonaldTrump) September 30, 2017

The official Puerto Rico death toll stands at 16, but it has not been updated since Wednesday. Reports from officials and journalists suggest the death toll could reach hundreds. According to the Center for Investigative Journalism, bodies are piling up at hospital morgues.