Fanuel Garcia said there could be more deaths, but that is the number of bodies so far recovered, and so far only 13 have been identified.
The new eruption spread panic as residents fled areas that had not been under evacuation warnings.
Later, 18 bodies are said to have been found in the village of San Miguel Los Lotes.
Rescue operations resumed Monday morning after being suspended overnight due to the risky conditions.
In addition, officials said, there are 46 people injured, majority seriously, more than 1.7 million being hit by the disaster, including 3,271 ordered evacuated and 1,787 in shelters in the departments of Escuintla, Sacatepequez and Chimaltenango since Sunday's eruption.
Dozens of videos appeared on social media and Guatemalan TV showing the extent of the devastation.
One village was extremely affected by running lava causing deaths and injuries. "When the lava was already here they passed by in their pickup trucks yelling at us to leave, but the cars did not stop to pick up the people", said Rafael Letran, a resident of El Rodeo.
Lopez's husband, Joel Gonzalez, said his father had been unable to escape and was believed to be "buried back there, at the house".
It urged residents living near the volcano to evacuate immediately and warned residents of the towns of Chimaltenango, Sacatepequez and Escuintla to watch out for volcanic rocks and ash.
In the meantime, Guatemalan President Jimmy Morales has declared three days of national mourning, according to the BBC.
The eruption forced the Guatemala City's La Aurora worldwide airport to shut down its only runway due to the presence of volcanic ash and to guarantee passenger and aircraft safety, Guatemala's civil aviation authority said in a Tweet.
The active volcano is located some 25 miles (40 km) southwest of the capital Guatemala City and is close to the colonial city of Antigua, popular with tourists and known for its coffee plantations.
Workers and guests were evacuated from the La Reunion golf club. "[I escaped] because we saw the lava was pouring through the cornfields and we ran toward the hills".
Pyroclastic flows, which are fast-moving mixtures of very hot gas and volcanic matter, rushed down the mountainside and engulfed villages.
The latest on the deadly volcano eruption in Guatemala is 62, at 1:00 p.m. Monday, confirmed the director of Guatemala's National Institute of Forensic Science.
Officials have advised people to wear masks as protection against falling ash in four of Guatemala's regions.