<h1>Global summit gathers 20 leaders as diplomatic talks, security meetings, arrests, and warnings over Ukraine escalate tensions</h1> China announced the Shanghai Cooperation Organisation summit in Tianjin will be the bloc's largest, with 20 world leaders, including the Indian prime minister and the Russian president, attending. The Indian envoy in the United States met lawmakers to discuss bilateral trade and energy security amid tariff tensions. China's foreign minister met Pakistan's army chief to discuss regional security and counter-terrorism. In Sri Lanka, a former president was arrested on allegations of misusing state funds. Punjab police arrested the nephew of an incarcerated former prime minister in connection with 2023 riot cases. The EU foreign policy chief warned that Russian demands for territorial concessions from Ukraine risk being a trap.