The Latest: Officials seek stronger border control, police

An Imam holds a prayer near the coffin draped with an Albanian flag of Diamant Zabergja 21, during his funeral ceremony in the village of Ropice, Kosovo on Tuesday, July 27, 2016. Zabergia is one of the victims of the Olympia shopping center in Munich, where a shooting took place leaving nine people dead four days ago. Three ethnic Albanians, two women and a man, were among the nine people killed. (AP Photo/Visar Kryeziu) (The Associated Press)

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Family members mourn over the coffin of Diamant Zabergja, 21, one of the victims of the Olympia shopping centre in Munich, during his funeral ceremony in the village of Ropice, Kosovo, Tuesday, July 26, 2016. Three ethnic Albanians, two women and a man, were among the nine people killed by a gunman in Munich four days ago. (AP Photo/Visar Kryeziu) (The Associated Press)

People attend the funeral ceremony for Diamant Zabergja, 21, one of the victims of the Olympia shopping centre in Munich, in the village of Ropice, Kosovo, Tuesday, July 26, 2016. Three ethnic Albanians, two women and a man, were among the nine people killed by a gunman in Munich four days ago. (AP Photo/Visar Kryeziu) (The Associated Press)

BERLIN – The Latest on a series of attacks in Germany (all times local):

9:45 a.m.

Top security officials in Germany are calling for tougher security screening of asylum-seekers and have also announced that more police officers will be hired following four attacks in the country — two of them claimed by the extremist Islamic State group.

Horst Seehofer, the interior minister of Bavaria — where three of last week's attacks took place — told the daily Sueddeutsche Zeitung Tuesday: "we must know who is in our country."

Thomas Strobl, the interior minister of Baden-Wuerttemberg — where a woman was killed by a Syrian attacker Sunday — also demanded a tougher stance toward asylum-seekers.

Three of the attacks were carried out by recent immigrants, rekindling concerns about Germany's ability to cope with the estimated 1 million migrants registered entering the country last year.

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9:05 a.m.

The extremist Islamic State group has published a video in which a man pledges allegiance to IS and vows Germany's people "won't be able to sleep peacefully anymore." It appears to be the same as the one found by German investigators on the phone of man who blew himself, killing himself and wounding 15 people.

The IS-linked Aamaq news agency released the video early Tuesday. The man on the video, his face covered with a black scarf, threatens to make life intolerable and that "we will blow up your homes."

German authorities could not immediately be reached to confirm whether the video was the same as the one found on the cell phone of a 27-year-old Syrian who blew himself Sunday night in the Bavarian town of Ansbach.