Donald Trump has arrived in Dayton, Ohio, at the start of a visit to the sites of two mass shootings at the weekend which left 31 people dead.

He will travel on to the Texan city of El Paso, where Hispanic people were targeted in an apparent hate crime. Earlier, he said he was concerned about "the rise of any group of hate... whether it's white supremacy" or any "other kind of supremacy".

But he himself has been accused of stoking hatred against Hispanic people. The Democratic congresswoman who represents El Paso, Veronica Escobar, is refusing to meet him, saying his "racist and hateful words & actions" had caused pain to her community and her country.

The El Paso shooting is being treated as a possible hate crime. Much of the city identifies as Hispanic and the suspect is thought to be the author of a text posted online which said: "This attack is a response to the Hispanic invasion of Texas".

The text echoed some of the US president's language, with Mr Trump having frequently used the term "invasion" to describe the situation on the US-Mexico border.

Police are yet to establish a conclusive motive for the Dayton attack but reveal they have uncovered evidence "that the shooter was exploring violent ideologies".

Attempts by Mr Trump and others to link the shootings to mental illness have been criticised by healthcare professionals.