The Greek Cyclades island group in the Aegean Sea has been hit by a series of earthquakes over the last two weeks. Experts have issued warnings and thousands of residents and tourists have left the popular holiday resort island of Santorini, which was hit on Wednesday by the strongest quake so far, measuring 5.2 on the Richter scale. Man and nature don't always get along, commentators stress.

President Donald Trump has effectively frozen US development aid. Most of the staff at the government agency USAID have been placed on leave, its website has been closed for maintenance and payments have been suspended for 90 days. During this time the agency's programmes are to be reviewed, according to Secretary of State Marco Rubio, who has been appointed by Trump as its acting director. The media examine the repercussions.

Last week, in the middle of the election campaign, Germany's Bundestag voted on proposals to tighten migration policy brought by the CDU/CSU opposition parliamentary group. An initial motion was supported by a fiercely debated majority achieved with the support of the AfD, which is suspected of right-wing extremism by the country's domestic intelligence agency. Another motion on specific changes to the immigration laws failed two days later. Europe's press takes a worried look.

At least eleven people were killed and several others wounded in a mass shooting at an adult education centre in the Swedish city of Örebro on Tuesday. According to the police, the perpetrator was probably among the dead. So far there are no indications that the attack was motivated by terrorism. Commentators take stock.

Donald Trump imposed high tariffs on goods coming from Mexico and Canada on the weekend, only to suspend the measure for 30 days after talks with the countries' leaders. New tariffs against China came into force, to which Beijing responded with counter-tariffs. Trump has also threatened to impose tariffs on the EU "pretty soon." Commentators discuss how Europe should react to a looming trade war with the US.

EU leaders convened for a special summit on Monday to discuss how to finance more spending on defence. Although no agreement was reached on joint European debt, Commission President Ursula von der Leyen proposed a generous interpretation of the debt rules. In addition to defence spending, commentators discuss the larger geopolitical issues at stake.