Buckingham Palace had no comment or clarification on the queen's remarks.
The incident took place as the Conservative lawmaker was meeting constituents in Essex.
Lava rolling toward the Atlantic Ocean forced the evacuation of another 300 people on La Palma late Thursday, bringing the total number to 7,000.
Ibrahim Rotich was detained after crashing his vehicle during a car chase with police.
"If we’re not careful we’re robbing from our children’s future through what we do now," the Duke of Cambridge said.
The two-time world championship bronze medalist was discovered dead at her home in Iten in western Kenya with stab wounds, said police.
The 4.5-magnitude earthquake was the strongest recorded temblor since volcanic eruptions began on La Palma 26 days ago.
Many of the residents of the 40-year-old building were elderly and lived alone in apartments as small as 140 square feet, local media said.
According to police, the suspected perpetrator walked around the city shooting at people.
The lava took a new course and put homes in Los Llanos de Aridane on La Palma island in its probable path of destruction.