UPDATED 3.34PM: The two children who ran away from home in Masterton have been found safe and well.

Thirteen-year-old Harlem and ten-year-old Lyrik Rimene-McRae left their home on Sunday night, apparently searching for their mother.

Police have confirmed they've found the pair at Te Ore Ore Bridge near Masterton at around 2pm.

"The bicycles belonging to the pair were found and shortly afterwards the two children were located as a result of information from the public,'' police said in a statement

Family members and friends have been reaching out to members of the public on social media in a bid to find the youngsters.

A family member said on Facebook the children had gone missing in search of their mother, who had been missing for a number of years.

"Family suspect they are heading south of Masterton, but could be anywhere. Search parties have been on the go in the Wairarapa region, but no luck has come of it,'' she wrote.

"The family is absolutely devastated and in need of help.''

A mounting roll call of helpers were this morning preparing scores of sandwiches to feed the ranks of searchers who were expected to arrive from throughout the region and beyond.

Social media had also been co-opted in the search, the relative said, with several Facebook group pages and innumerable friends and family posting photographs of the children and pleading for their return or reports of sightings. 

The relative said the children were keen students who enjoyed school, sports and a had wide circles of friends. 

The boy had come to blows with his younger brother last week but peace had been made, while the girl had been in a lot of trouble in the days ahead of their return to school.

“They are close. They might fight but they are close.”