Six months after the 2002 eruption, nearby Mount Nyamuragira also erupted. Protests erupted in Pamplona, but they were quelled. Political tensions have sometimes erupted into violence. The volcano last erupted in 1988, ending in 1990. Fierce fighting erupted there after British reinforcements arrived. In 1783 the Laki volcano erupted, with devastating effects. In 2011, a civil uprising erupted in Syria, prompting hasty government reforms. Riots again erupted in Alexandria in 40 between Jews and Greeks. After his execution, a revolt erupted. The following morning, May 18, at , the volcano erupted. In 1297, the country erupted in open revolt. Lionel erupted into a fierce rage and struck Alexander. The revolts first erupted in the cities. In 1968 the Arenal Volcano, in Costa Rica, erupted and killed 87 people. One subsidiary cone erupted voluminous basalt and andesite lava flows.