Poland's prime minister said the electricity system is secure and reliable.

Ukraine's SBU said on Aug 4 it has struck more than 100 Russian strategic targets over the past 40 days, targeting defence-industrial firms, air bases, air-defence systems, command posts, ships, 'shadow fleet' tankers, refineries, oil depots, pump stations, oil terminals and military logistics, causing damage to equipment and infrastructure. The SBU said strikes hit six military airfields, including Saky, Gvardeyskoye and Engels, and the Yevpatoria aircraft factory. Kyiv said it will continue operations to degrade Russia's military-economic capacity. Russia had no immediate comment.

港股商业航天板块多数走强，拓璞数控(07688.HK)涨超4%，航天控股(00031.HK)涨超3%，蓝思科技(06613.HK)涨超2%，钧达股份(02865.HK)、金风科技(02208.HK)涨超1%。