U.S. President Donald Trump on Sunday urged Americans to "stand strong" in the wake of a mass shooting at a church in Sutherland Springs, Texas, which left at least 26 people dead.

"Our thoughts and prayers are with the victims and families in today's horrible...attack," Trump said in Japan, where he is visiting as part of his five-nation, 13-day tour of Asia.

While the public "cannot put into words the pain and grief that we all fear and we cannot begin to imagine the suffering of those" who lost loved ones, Americans should "do what they do best" in times of tragedy, he added.

"We pull together. We join hands, we lock arms and, through the tears and through the sadness, we stand strong, oh so strong," Trump said, according to The Hill.

"All Americans pray to god to help the wounded and the families of the victims," he added.

"My administration will provide it’s full support for the great state of Texas and all local authorities investigating this horrible crime," promised Trump.

The gunman in the shooting has been identified as 26-year-old Devin Patrick Kelley. He had fled the scene of the attack and was pursued by law enforcement officials into Guadalupe County, where he was later killed by a gunshot wound.

There was no immediate information regarding the reason behind the shooting, though federal officials quoted by NBC News said there were no obvious signs of a connection to terrorism.

Before Trump's statement, he sent condolences to the victims of the mass shooting via Twitter.

Prime Minister Binyamin Netanyahu commented on the shooting as well upon his arrival in Israel from London.

"Horrified by the savagery in Texas. Our hearts are with the victims, their families and the American people," he said.