The Ukrainian port city of Mariupol in the southeast of the country has been “90 percent” destroyed after being besieged by Russian forces, its mayor Vadym Boichenko said on Monday. “The sad news is that 90 percent of the infrastructure in the city is destroyed and 40 percent is unrecoverable,” Boichenko told a press conference. Around 130,000 people remained trapped in the city, which continues to be pounded by Russian bombardments, he said. Approximately half a million people lived in the city on the coast of the Sea of Azov before the outbreak of the war. “The Russian army is brutally destr…